svn commit: r51465 - in head/share/security/patches: EN-18:01 EN-18:02
Gordon Tetlow
gordon at FreeBSD.org
Wed Mar 7 14:54:42 UTC 2018
Author: gordon (src,ports committer)
Date: Wed Mar 7 14:54:41 2018
New Revision: 51465
URL: https://svnweb.freebsd.org/changeset/doc/51465
Log:
Add actual patches to the doc repo. This would probably help.
Approved by: so
Added:
head/share/security/patches/EN-18:01/tzdata-2018c.patch (contents, props changed)
head/share/security/patches/EN-18:02/file-10.3.patch (contents, props changed)
head/share/security/patches/EN-18:02/file-10.4.patch (contents, props changed)
head/share/security/patches/EN-18:02/file-11.patch (contents, props changed)
Added: head/share/security/patches/EN-18:01/tzdata-2018c.patch
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/security/patches/EN-18:01/tzdata-2018c.patch Wed Mar 7 14:54:41 2018 (r51465)
@@ -0,0 +1,1459 @@
+--- contrib/tzdata/Makefile.orig
++++ contrib/tzdata/Makefile
+@@ -42,37 +42,64 @@
+ # Also see TZDEFRULESTRING below, which takes effect only
+ # if the time zone files cannot be accessed.
+
+-# Everything gets put in subdirectories of. . .
+
+-TOPDIR= /usr/local
++# Installation locations.
++#
++# The defaults are suitable for Debian, except that if REDO is
++# posix_right or right_posix then files that Debian puts under
++# /usr/share/zoneinfo/posix and /usr/share/zoneinfo/right are instead
++# put under /usr/share/zoneinfo-posix and /usr/share/zoneinfo-leaps,
++# respectively. Problems with the Debian approach are discussed in
++# the commentary for the right_posix rule (below).
+
++# Destination directory, which can be used for staging.
++# 'make DESTDIR=/stage install' installs under /stage (e.g., to
++# /stage/etc/localtime instead of to /etc/localtime). Files under
++# /stage are not intended to work as-is, but can be copied by hand to
++# the root directory later. If DESTDIR is empty, 'make install' does
++# not stage, but installs directly into production locations.
++DESTDIR =
++
++# Everything is installed into subdirectories of TOPDIR, and used there.
++# TOPDIR should be empty (meaning the root directory),
++# or a directory name that does not end in "/".
++# TOPDIR should be empty or an absolute name unless you're just testing.
++TOPDIR =
++
++# The default local time zone is taken from the file TZDEFAULT.
++TZDEFAULT = $(TOPDIR)/etc/localtime
++
++# The subdirectory containing installed program and data files, and
++# likewise for installed files that can be shared among architectures.
++# These should be relative file names.
++USRDIR = usr
++USRSHAREDIR = $(USRDIR)/share
++
+ # "Compiled" time zone information is placed in the "TZDIR" directory
+ # (and subdirectories).
+-# Use an absolute path name for TZDIR unless you're just testing the software.
+ # TZDIR_BASENAME should not contain "/" and should not be ".", ".." or empty.
+-
+ TZDIR_BASENAME= zoneinfo
+-TZDIR= $(TOPDIR)/etc/$(TZDIR_BASENAME)
++TZDIR = $(TOPDIR)/$(USRSHAREDIR)/$(TZDIR_BASENAME)
+
+-# Types to try, as an alternative to time_t. int64_t should be first.
+-TIME_T_ALTERNATIVES= int64_t int32_t uint32_t uint64_t
++# The "tzselect" and (if you do "make INSTALL") "date" commands go in:
++BINDIR = $(TOPDIR)/$(USRDIR)/bin
+
+-# The "tzselect", "zic", and "zdump" commands get installed in. . .
++# The "zdump" command goes in:
++ZDUMPDIR = $(BINDIR)
+
+-ETCDIR= $(TOPDIR)/etc
++# The "zic" command goes in:
++ZICDIR = $(TOPDIR)/$(USRDIR)/sbin
+
+-# If you "make INSTALL", the "date" command gets installed in. . .
+-
+-BINDIR= $(TOPDIR)/bin
+-
+ # Manual pages go in subdirectories of. . .
++MANDIR = $(TOPDIR)/$(USRSHAREDIR)/man
+
+-MANDIR= $(TOPDIR)/man
+-
+ # Library functions are put in an archive in LIBDIR.
++LIBDIR = $(TOPDIR)/$(USRDIR)/lib
+
+-LIBDIR= $(TOPDIR)/lib
+
++# Types to try, as an alternative to time_t. int64_t should be first.
++TIME_T_ALTERNATIVES = int64_t int32_t uint32_t uint64_t
++
+ # If you want only POSIX time, with time values interpreted as
+ # seconds since the epoch (not counting leap seconds), use
+ # REDO= posix_only
+@@ -105,11 +132,14 @@
+ TZDATA_TEXT= leapseconds tzdata.zi
+
+ # For backward-compatibility links for old zone names, use
++# BACKWARD= backward
++# If you also want the link US/Pacific-New, even though it is confusing
++# and is planned to be removed from the database eventually, use
+ # BACKWARD= backward pacificnew
+ # To omit these links, use
+ # BACKWARD=
+
+-BACKWARD= backward pacificnew
++BACKWARD= backward
+
+ # If you want out-of-scope and often-wrong data from the file 'backzone', use
+ # PACKRATDATA= backzone
+@@ -313,7 +343,7 @@
+
+ # How to use zic to install tz binary files.
+
+-ZIC_INSTALL= $(ZIC) -d $(DESTDIR)$(TZDIR) $(LEAPSECONDS)
++ZIC_INSTALL= $(ZIC) -d '$(DESTDIR)$(TZDIR)' $(LEAPSECONDS)
+
+ # The name of a Posix-compliant 'awk' on your system.
+ AWK= awk
+@@ -341,8 +371,8 @@
+ VALIDATE = nsgmls
+ VALIDATE_FLAGS = -s -B -wall -wno-unused-param
+ VALIDATE_ENV = \
+- SGML_CATALOG_FILES=$(SGML_CATALOG_FILES) \
+- SGML_SEARCH_PATH=$(SGML_SEARCH_PATH) \
++ SGML_CATALOG_FILES='$(SGML_CATALOG_FILES)' \
++ SGML_SEARCH_PATH='$(SGML_SEARCH_PATH)' \
+ SP_CHARSET_FIXED=YES \
+ SP_ENCODING=UTF-8
+
+@@ -396,7 +426,7 @@
+ #MAKE= make
+
+ cc= cc
+-CC= $(cc) -DTZDIR=\"$(TZDIR)\"
++CC= $(cc) -DTZDIR='"$(TZDIR)"'
+
+ AR= ar
+
+@@ -421,18 +451,19 @@
+ date.1.txt
+ COMMON= calendars CONTRIBUTING LICENSE Makefile \
+ NEWS README theory.html version
+-WEB_PAGES= tz-art.htm tz-how-to.html tz-link.htm
++WEB_PAGES= tz-art.html tz-how-to.html tz-link.html
+ DOCS= $(MANS) date.1 $(MANTXTS) $(WEB_PAGES)
+ PRIMARY_YDATA= africa antarctica asia australasia \
+ europe northamerica southamerica
+-YDATA= $(PRIMARY_YDATA) etcetera $(BACKWARD)
++YDATA= $(PRIMARY_YDATA) etcetera
+ NDATA= systemv factory
+-TDATA= $(YDATA) $(NDATA)
++TDATA_TO_CHECK= $(YDATA) $(NDATA) backward pacificnew
++TDATA= $(YDATA) $(NDATA) $(BACKWARD)
+ ZONETABLES= zone1970.tab zone.tab
+ TABDATA= iso3166.tab $(TZDATA_TEXT) $(ZONETABLES)
+ LEAP_DEPS= leapseconds.awk leap-seconds.list
+-TZDATA_ZI_DEPS= zishrink.awk $(TDATA) $(PACKRATDATA)
+-DATA= $(YDATA) $(NDATA) backzone iso3166.tab leap-seconds.list \
++TZDATA_ZI_DEPS= zishrink.awk version $(TDATA) $(PACKRATDATA)
++DATA= $(TDATA_TO_CHECK) backzone iso3166.tab leap-seconds.list \
+ leapseconds yearistype.sh $(ZONETABLES)
+ AWK_SCRIPTS= checklinks.awk checktab.awk leapseconds.awk zishrink.awk
+ MISC= $(AWK_SCRIPTS) zoneinfo2tdf.pl
+@@ -457,7 +488,7 @@
+ newctime.3 newstrftime.3 newtzset.3 northamerica \
+ pacificnew private.h \
+ southamerica strftime.c systemv theory.html \
+- time2posix.3 tz-art.htm tz-how-to.html tz-link.htm \
++ time2posix.3 tz-art.html tz-how-to.html tz-link.html \
+ tzfile.5 tzfile.h tzselect.8 tzselect.ksh \
+ workman.sh yearistype.sh \
+ zdump.8 zdump.c zic.8 zic.c \
+@@ -473,35 +504,41 @@
+ ALL: all date $(ENCHILADA)
+
+ install: all $(DATA) $(REDO) $(MANS)
+- mkdir -p $(DESTDIR)$(ETCDIR) $(DESTDIR)$(TZDIR) \
+- $(DESTDIR)$(LIBDIR) \
+- $(DESTDIR)$(MANDIR)/man3 $(DESTDIR)$(MANDIR)/man5 \
+- $(DESTDIR)$(MANDIR)/man8
+- $(ZIC_INSTALL) -l $(LOCALTIME) -p $(POSIXRULES)
+- cp -f $(TABDATA) $(DESTDIR)$(TZDIR)/.
+- cp tzselect zic zdump $(DESTDIR)$(ETCDIR)/.
+- cp libtz.a $(DESTDIR)$(LIBDIR)/.
+- $(RANLIB) $(DESTDIR)$(LIBDIR)/libtz.a
+- cp -f newctime.3 newtzset.3 $(DESTDIR)$(MANDIR)/man3/.
+- cp -f tzfile.5 $(DESTDIR)$(MANDIR)/man5/.
+- cp -f tzselect.8 zdump.8 zic.8 $(DESTDIR)$(MANDIR)/man8/.
++ mkdir -p '$(DESTDIR)$(BINDIR)' \
++ '$(DESTDIR)$(ZDUMPDIR)' '$(DESTDIR)$(ZICDIR)' \
++ '$(DESTDIR)$(LIBDIR)' \
++ '$(DESTDIR)$(MANDIR)/man3' '$(DESTDIR)$(MANDIR)/man5' \
++ '$(DESTDIR)$(MANDIR)/man8'
++ $(ZIC_INSTALL) -l $(LOCALTIME) -p $(POSIXRULES) \
++ -t '$(DESTDIR)$(TZDEFAULT)'
++ cp -f $(TABDATA) '$(DESTDIR)$(TZDIR)/.'
++ cp tzselect '$(DESTDIR)$(BINDIR)/.'
++ cp zdump '$(DESTDIR)$(ZDUMPDIR)/.'
++ cp zic '$(DESTDIR)$(ZICDIR)/.'
++ cp libtz.a '$(DESTDIR)$(LIBDIR)/.'
++ $(RANLIB) '$(DESTDIR)$(LIBDIR)/libtz.a'
++ cp -f newctime.3 newtzset.3 '$(DESTDIR)$(MANDIR)/man3/.'
++ cp -f tzfile.5 '$(DESTDIR)$(MANDIR)/man5/.'
++ cp -f tzselect.8 zdump.8 zic.8 '$(DESTDIR)$(MANDIR)/man8/.'
+
+ INSTALL: ALL install date.1
+- mkdir -p $(DESTDIR)$(BINDIR) $(DESTDIR)$(MANDIR)/man1
+- cp date $(DESTDIR)$(BINDIR)/.
+- cp -f date.1 $(DESTDIR)$(MANDIR)/man1/.
++ mkdir -p '$(DESTDIR)$(BINDIR)' '$(DESTDIR)$(MANDIR)/man1'
++ cp date '$(DESTDIR)$(BINDIR)/.'
++ cp -f date.1 '$(DESTDIR)$(MANDIR)/man1/.'
+
+ version: $(VERSION_DEPS)
+ { (type git) >/dev/null 2>&1 && \
+ V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
+ --abbrev=7 --dirty` || \
+- V=$(VERSION); } && \
++ V='$(VERSION)'; } && \
+ printf '%s\n' "$$V" >$@.out
+ mv $@.out $@
+
+ # This file can be tailored by setting BACKWARD, PACKRATDATA, etc.
+ tzdata.zi: $(TZDATA_ZI_DEPS)
+- LC_ALL=C $(AWK) -f zishrink.awk $(TDATA) $(PACKRATDATA) >$@.out
++ version=`sed 1q version` && \
++ LC_ALL=C $(AWK) -v version="$$version" -f zishrink.awk \
++ $(TDATA) $(PACKRATDATA) >$@.out
+ mv $@.out $@
+
+ version.h: version
+@@ -529,12 +566,13 @@
+ # Arguments to pass to submakes of install_data.
+ # They can be overridden by later submake arguments.
+ INSTALLARGS = \
+- BACKWARD=$(BACKWARD) \
+- DESTDIR=$(DESTDIR) \
++ BACKWARD='$(BACKWARD)' \
++ DESTDIR='$(DESTDIR)' \
+ LEAPSECONDS='$(LEAPSECONDS)' \
+ PACKRATDATA='$(PACKRATDATA)' \
+- TZDIR=$(TZDIR) \
+- YEARISTYPE=$(YEARISTYPE) \
++ TZDEFAULT='$(TZDEFAULT)' \
++ TZDIR='$(TZDIR)' \
++ YEARISTYPE='$(YEARISTYPE)' \
+ ZIC='$(ZIC)'
+
+ # 'make install_data' installs one set of tz binary files.
+@@ -558,16 +596,16 @@
+ # You must replace all of $(TZDIR) to switch from not using leap seconds
+ # to using them, or vice versa.
+ right_posix: right_only
+- rm -fr $(DESTDIR)$(TZDIR)-leaps
+- ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR)-leaps || \
+- $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-leaps right_only
+- $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-posix posix_only
++ rm -fr '$(DESTDIR)$(TZDIR)-leaps'
++ ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-leaps' || \
++ $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
++ $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
+
+ posix_right: posix_only
+- rm -fr $(DESTDIR)$(TZDIR)-posix
+- ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR)-posix || \
+- $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-posix posix_only
+- $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-leaps right_only
++ rm -fr '$(DESTDIR)$(TZDIR)-posix'
++ ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-posix' || \
++ $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
++ $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
+
+ # This obsolescent rule is present for backwards compatibility with
+ # tz releases 2014g through 2015g. It should go away eventually.
+@@ -633,7 +671,7 @@
+ $(MISC) $(SOURCES) $(WEB_PAGES) \
+ CONTRIBUTING LICENSE Makefile README \
+ version tzdata.zi && \
+- ! grep -Env $(SAFE_SHARP_LINE) $(TDATA) backzone \
++ ! grep -Env $(SAFE_SHARP_LINE) $(TDATA_TO_CHECK) backzone \
+ leapseconds yearistype.sh zone.tab && \
+ ! grep -Env $(OK_LINE) $(ENCHILADA); \
+ }
+@@ -641,14 +679,16 @@
+ check_white_space: $(ENCHILADA)
+ patfmt=' \t|[\f\r\v]' && pat=`printf "$$patfmt\\n"` && \
+ ! grep -En "$$pat" $(ENCHILADA)
+- ! grep -n '[[:space:]]$$' $(ENCHILADA)
++ ! grep -n '[[:space:]]$$' \
++ $$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list)
+
+ PRECEDES_FILE_NAME = ^(Zone|Link[[:space:]]+[^[:space:]]+)[[:space:]]+
+ FILE_NAME_COMPONENT_TOO_LONG = \
+ $(PRECEDES_FILE_NAME)[^[:space:]]*[^/[:space:]]{15}
+
+-check_name_lengths: $(TDATA) backzone
+- ! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' $(TDATA) backzone
++check_name_lengths: $(TDATA_TO_CHECK) backzone
++ ! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \
++ $(TDATA_TO_CHECK) backzone
+
+ CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; }
+
+@@ -662,8 +702,8 @@
+ $(AWK) '/^[^#]/ $(CHECK_CC_LIST)' zone1970.tab | \
+ LC_ALL=C sort -cu
+
+-check_links: checklinks.awk $(TDATA)
+- $(AWK) -f checklinks.awk $(TDATA)
++check_links: checklinks.awk $(TDATA_TO_CHECK)
++ $(AWK) -f checklinks.awk $(TDATA_TO_CHECK)
+ $(AWK) -f checklinks.awk tzdata.zi
+
+ check_tables: checktab.awk $(PRIMARY_YDATA) $(ZONETABLES)
+@@ -764,12 +804,12 @@
+
+ check_public:
+ $(MAKE) maintainer-clean
+- $(MAKE) "CFLAGS=$(GCC_DEBUG_FLAGS)" ALL
++ $(MAKE) CFLAGS='$(GCC_DEBUG_FLAGS)' ALL
+ mkdir -p public.dir
+- for i in $(TDATA) tzdata.zi; do \
++ for i in $(TDATA_TO_CHECK) tzdata.zi; do \
+ $(zic) -v -d public.dir $$i 2>&1 || exit; \
+ done
+- $(zic) -v -d public.dir $(TDATA)
++ $(zic) -v -d public.dir $(TDATA_TO_CHECK)
+ rm -fr public.dir
+
+ # Check that the code works under various alternative
+@@ -790,8 +830,11 @@
+ REDO='$(REDO)' \
+ install && \
+ diff $$quiet_option -r \
+- time_t.dir/int64_t/etc/zoneinfo \
+- time_t.dir/$$type/etc/zoneinfo && \
++ time_t.dir/int64_t/etc \
++ time_t.dir/$$type/etc && \
++ diff $$quiet_option -r \
++ time_t.dir/int64_t/usr/share \
++ time_t.dir/$$type/usr/share && \
+ case $$type in \
+ int32_t) range=-2147483648,2147483647;; \
+ uint32_t) range=0,4294967296;; \
+@@ -800,9 +843,9 @@
+ *) range=-10000000000,10000000000;; \
+ esac && \
+ echo checking $$type zones ... && \
+- time_t.dir/int64_t/etc/zdump -V -t $$range $$zones \
++ time_t.dir/int64_t/usr/bin/zdump -V -t $$range $$zones \
+ >time_t.dir/int64_t.out && \
+- time_t.dir/$$type/etc/zdump -V -t $$range $$zones \
++ time_t.dir/$$type/usr/bin/zdump -V -t $$range $$zones \
+ >time_t.dir/$$type.out && \
+ diff -u time_t.dir/int64_t.out time_t.dir/$$type.out \
+ || exit; \
+--- contrib/tzdata/NEWS.orig
++++ contrib/tzdata/NEWS
+@@ -1,5 +1,147 @@
+ News for the tz database
+
++Release 2018c - 2018-01-22 23:00:44 -0800
++
++ Briefly:
++ Revert Irish changes that relied on negative DST offsets.
++
++ Changes to tm_isdst
++
++ Revert the 2018a change to Europe/Dublin. As before, this change
++ does not affect UT offsets or abbreviations; it affects only
++ whether timestamps are considered to be standard time or
++ daylight-saving time, as expressed in the tm_isdst flag of C's
++ struct tm type. This reversion is intended to be a temporary
++ workaround for problems discovered with downstream uses of
++ releases 2018a and 2018b, which implemented Irish time by using
++ negative DST offsets in the Eire rules of the 'europe' file.
++ Although negative DST offsets have been part of tzcode for many
++ years and are supported by many platforms, they were not
++ documented before 2018a and ICU and OpenJDK do not currently
++ support them. A mechanism to export data to platforms lacking
++ support for negative DST is planned to be developed before the
++ change is reapplied. (Problems reported by Deborah Goldsmith and
++ Stephen Colebourne.)
++
++ Changes to past time stamps
++
++ Japanese DST transitions (1948-1951) were Sundays at 00:00, not
++ Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.)
++
++ Changes to build procedure
++
++ The build procedure now works around mawk 1.3.3's lack of support
++ for character class expressions. (Problem reported by Ohyama.)
++
++
++Release 2018b - 2018-01-17 23:24:48 -0800
++
++ Briefly:
++ Fix a packaging problem in tz2018a, which was missing 'pacificnew'.
++
++ Changes to build procedure
++
++ The distribution now contains the file 'pacificnew' again.
++ This file was inadvertantly omitted in the 2018a distribution.
++ (Problem reported by Matias Fonzo.)
++
++
++Release 2018a - 2018-01-12 22:29:21 -0800
++
++ Briefly:
++ São Tomé and Príncipe switched from +00 to +01.
++ Brazil's DST will now start on November's first Sunday.
++ Ireland's standard time is now in the summer, not the winter.
++ Use Debian-style installation locations, instead of 4.3BSD-style.
++ New zic option -t.
++
++ Changes to past and future time stamps
++
++ São Tomé and Príncipe switched from +00 to +01 on 2018-01-01 at
++ 01:00. (Thanks to Steffen Thorsen and Michael Deckers.)
++
++ Changes to future time stamps
++
++ Starting in 2018 southern Brazil will begin DST on November's
++ first Sunday instead of October's third Sunday. (Thanks to
++ Steffen Thorsen.)
++
++ Changes to past time stamps
++
++ A discrepancy of 4 s in timestamps before 1931 in South Sudan has
++ been corrected. The 'backzone' and 'zone.tab' files did not agree
++ with the 'africa' and 'zone1970.tab' files. (Problem reported by
++ Michael Deckers.)
++
++ The abbreviation invented for Bolivia Summer Time (1931-2) is now
++ BST instead of BOST, to be more consistent with the convention
++ used for Latvian Summer Time (1918-9) and for British Summer Time.
++
++ Changes to tm_isdst
++
++ Change Europe/Dublin so that it observes Irish Standard Time (UT
++ +01) in summer and GMT (as negative daylight-saving) in winter,
++ instead of observing standard time (GMT) in winter and Irish
++ Summer Time (UT +01) in summer. This change does not affect UT
++ offsets or abbreviations; it affects only whether timestamps are
++ considered to be standard time or daylight-saving time, as
++ expressed in the tm_isdst flag of C's struct tm type.
++ (Discrepancy noted by Derick Rethans.)
++
++ Changes to build procedure
++
++ The default installation locations have been changed to mostly
++ match Debian circa 2017, instead of being designed as an add-on to
++ 4.3BSD circa 1986. This affects the Makefile macros TOPDIR,
++ TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR,
++ USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor
++ locations more precisely. (This responds to suggestions from
++ Brian Inglis and from Steve Summit.)
++
++ The default installation procedure no longer creates the
++ backward-compatibility link US/Pacific-New, which causes
++ confusion during user setup (e.g., see Debian bug 815200).
++ Use 'make BACKWARD="backward pacificnew"' to create the link
++ anyway, for now. Eventually we plan to remove the link entirely.
++
++ tzdata.zi now contains a version-number comment.
++ (Suggested by Tom Lane.)
++
++ The Makefile now quotes values like BACKWARD more carefully when
++ passing them to the shell. (Problem reported by Zefram.)
++
++ Builders no longer need to specify -DHAVE_SNPRINTF on platforms
++ that have snprintf and use pre-C99 compilers. (Problem reported
++ by Jon Skeet.)
++
++ Changes to code
++
++ zic has a new option -t FILE that specifies the location of the
++ file that determines local time when TZ is unset. The default for
++ this location can be configured via the new TZDEFAULT makefile
++ macro, which defaults to /etc/localtime.
++
++ Diagnostics and commentary now distinguish UT from UTC more
++ carefully; see theory.html for more information about UT vs UTC.
++
++ zic has been ported to GCC 8's -Wstringop-truncation option.
++ (Problem reported by Martin Sebor.)
++
++ Changes to documentation and commentary
++
++ The zic man page now documents the longstanding behavior that
++ times and years can be out of the usual range, with negative times
++ counting backwards from midnight and with year 0 preceding year 1.
++ (Problem reported by Michael Deckers.)
++
++ The theory.html file now mentions the POSIX limit of six chars
++ per abbreviation, and lists alphabetic abbreviations used.
++
++ The files tz-art.htm and tz-link.htm have been renamed to
++ tz-art.html and tz-link.html, respectively, for consistency with
++ other file names and to simplify web server configuration.
++
++
+ Release 2017c - 2017-10-20 14:49:34 -0700
+
+ Briefly:
+@@ -895,8 +1037,8 @@
+ (Thanks to Jon Skeet and Arthur David Olson.) Constraints on
+ simultaneity are now documented.
+
+- The two characters '%z' in a zone format now stand for the UTC
+- offset, e.g., '-07' for seven hours behind UTC and '+0530' for
++ The two characters '%z' in a zone format now stand for the UT
++ offset, e.g., '-07' for seven hours behind UT and '+0530' for
+ five hours and thirty minutes ahead. This better supports time
+ zone abbreviations conforming to POSIX.1-2001 and later.
+
+@@ -1019,13 +1161,13 @@
+ The spring 1988 transition was 1988-10-09, not 1988-10-02.
+ The fall 1990 transition was 1990-03-11, not 1990-03-18.
+
+- Assume no UTC offset change for Pacific/Easter on 1890-01-01,
++ Assume no UT offset change for Pacific/Easter on 1890-01-01,
+ and omit all transitions on Pacific/Easter from 1942 through 1946
+ since we have no data suggesting that they existed.
+
+ One more zone has been turned into a link, as it differed
+ from an existing zone only for older time stamps. As usual,
+- this change affects UTC offsets in pre-1970 time stamps only.
++ this change affects UT offsets in pre-1970 time stamps only.
+ The zone's old contents have been moved to the 'backzone' file.
+ The affected zone is America/Montreal.
+
+@@ -1055,7 +1197,7 @@
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older time stamps. As usual,
+- these changes affect UTC offsets in pre-1970 time stamps only.
++ these changes affect UT offsets in pre-1970 time stamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: America/Antigua, America/Cayman,
+ Pacific/Midway, and Pacific/Saipan.
+@@ -1107,7 +1249,7 @@
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older time stamps. As usual,
+- these changes affect UTC offsets in pre-1970 time stamps only.
++ these changes affect UT offsets in pre-1970 time stamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait,
+ and Asia/Muscat.
+@@ -1154,7 +1296,7 @@
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older time stamps. As usual,
+- these changes affect UTC offsets in pre-1970 time stamps only.
++ these changes affect UT offsets in pre-1970 time stamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: Africa/Addis_Ababa, Africa/Asmara,
+ Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala,
+@@ -1244,7 +1386,7 @@
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older timestamps. As usual,
+- these changes affect UTC offsets in pre-1970 timestamps only.
++ these changes affect UT offsets in pre-1970 timestamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: Africa/Blantyre, Africa/Bujumbura,
+ Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
+@@ -1329,7 +1471,7 @@
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older timestamps. As usual,
+- these changes affect UTC offsets in pre-1970 timestamps only.
++ these changes affect UT offsets in pre-1970 timestamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: Africa/Bangui, Africa/Brazzaville,
+ Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda,
+@@ -1479,7 +1621,7 @@
+ standard and daylight saving time the abbreviations are AEST and AEDT
+ instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT,
+ and AWST/AWDT are now used instead of the former CST, CWST, and WST.
+- This change does not affect UTC offsets, only time zone abbreviations.
++ This change does not affect UT offsets, only time zone abbreviations.
+ (Thanks to Rich Tibbett and many others.)
+
+ Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07)
+@@ -1516,8 +1658,8 @@
+ Treindl sent helpful translations of two papers by Guo Qingsheng.)
+
+ Some zones have been turned into links, when they differed from existing
+- zones only for older UTC offsets where data entries were likely invented.
+- These changes affect UTC offsets in pre-1970 timestamps only. This is
++ zones only for older UT offsets where data entries were likely invented.
++ These changes affect UT offsets in pre-1970 timestamps only. This is
+ similar to the change in release 2013e, except this time for western
+ Africa. The affected zones are: Africa/Bamako, Africa/Banjul,
+ Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome,
+--- contrib/tzdata/README.orig
++++ contrib/tzdata/README
+@@ -11,7 +11,7 @@
+ and daylight-saving rules.
+
+ See <https://www.iana.org/time-zones/repository/tz-link.html> or the
+-file tz-link.htm for how to acquire the code and data. Once acquired,
++file tz-link.html for how to acquire the code and data. Once acquired,
+ read the comments in the file 'Makefile' and make any changes needed
+ to make things right for your system, especially if you are using some
+ platform other than GNU/Linux. Then run the following commands,
+@@ -18,7 +18,7 @@
+ substituting your desired installation directory for "$HOME/tzdir":
+
+ make TOPDIR=$HOME/tzdir install
+- $HOME/tzdir/etc/zdump -v America/Los_Angeles
++ $HOME/tzdir/usr/bin/zdump -v America/Los_Angeles
+
+ Historical local time information has been included here to:
+
+--- contrib/tzdata/africa.orig
++++ contrib/tzdata/africa
+@@ -158,7 +158,6 @@
+ Link Africa/Abidjan Africa/Lome # Togo
+ Link Africa/Abidjan Africa/Nouakchott # Mauritania
+ Link Africa/Abidjan Africa/Ouagadougou # Burkina Faso
+-Link Africa/Abidjan Africa/Sao_Tome # São Tomé and Príncipe
+ Link Africa/Abidjan Atlantic/St_Helena # St Helena
+
+ # Djibouti
+@@ -425,7 +424,7 @@
+ #
+ # The Nautical Almanac for the Year 1970, p 264, is the source for -0:44:30.
+ #
+-# In 1972 Liberia was the last country to switch from a UTC offset
++# In 1972 Liberia was the last country to switch from a UT offset
+ # that was not a multiple of 15 or 20 minutes. The 1972 change was on
+ # 1972-01-07, according to an entry dated 1972-01-04 on p 330 of:
+ # Presidential Papers: First year of the administration of
+@@ -1037,6 +1036,19 @@
+ # Inaccessible, Nightingale: uninhabited
+
+ # São Tomé and Príncipe
++
++# From Steffen Thorsen (2018-01-08):
++# Multiple sources tell that São Tomé changed from UTC to UTC+1 as
++# they entered the year 2018.
++# From Michael Deckers (2018-01-08):
++# the switch is from 01:00 to 02:00 ... [Decree No. 25/2017]
++# http://www.mnec.gov.st/index.php/publicacoes/documentos/file/90-decreto-lei-n-25-2017
++
++Zone Africa/Sao_Tome 0:26:56 - LMT 1884
++ -0:36:45 - LMT 1912 # Lisbon Mean Time
++ 0:00 - GMT 2018 Jan 1 01:00
++ 1:00 - WAT
++
+ # Senegal
+ # See Africa/Abidjan.
+
+--- contrib/tzdata/asia.orig
++++ contrib/tzdata/asia
+@@ -50,7 +50,7 @@
+ # 9:00 KST KDT Korea when at +09
+ # 9:30 ACST Australian Central Standard Time
+ # Otherwise, these tables typically use numeric abbreviations like +03
+-# and +0330 for integer hour and minute UTC offsets. Although earlier
++# and +0330 for integer hour and minute UT offsets. Although earlier
+ # editions invented alphabetic time zone abbreviations for every
+ # offset, this did not reflect common practice.
+ #
+@@ -647,17 +647,17 @@
+ # time", in which abolished the adoption of Western Standard Time in
+ # western islands (listed above), which means the whole Japan
+ # territory, including later occupations, adopt Japan Central Time
+-# (UTC+9). The adoption began on Oct 1, 1937. The original text can
++# (UT+9). The adoption began on Oct 1, 1937. The original text can
+ # be found on Wikisource:
+ # https://ja.wikisource.org/wiki/明治二十八年勅令第百六十七號標準時ニ關スル件中改正ノ件
+ #
+-# That is, the time zone of Taipei switched to UTC+9 on Oct 1, 1937.
++# That is, the time zone of Taipei switched to UT+9 on Oct 1, 1937.
+
+ # From Yu-Cheng Chuang (2014-07-02):
+-# I've found more evidence about when the time zone was switched from UTC+9
+-# back to UTC+8 after WW2. I believe it was on Sep 21, 1945. In a document
++# I've found more evidence about when the time zone was switched from UT+9
++# back to UT+8 after WW2. I believe it was on Sep 21, 1945. In a document
+ # during Japanese era [1] in which the officer told the staff to change time
+-# zone back to Western Standard Time (UTC+8) on Sep 21. And in another
++# zone back to Western Standard Time (UT+8) on Sep 21. And in another
+ # history page of National Cheng Kung University [2], on Sep 21 there is a
+ # note "from today, switch back to Western Standard Time". From these two
+ # materials, I believe that the time zone change happened on Sep 21. And
+@@ -1464,17 +1464,17 @@
+ # of the Japanese wanted to scrap daylight-saving time, as opposed to 30% who
+ # wanted to keep it.)
+
+-# From Paul Eggert (2006-03-22):
+-# Shanks & Pottenger write that DST in Japan during those years was as follows:
++# From Takayuki Nikai (2018-01-19):
++# The source of information is Japanese law.
++# http://www.shugiin.go.jp/internet/itdb_housei.nsf/html/houritsu/00219480428029.htm
++# http://www.shugiin.go.jp/internet/itdb_housei.nsf/html/houritsu/00719500331039.htm
++# ... In summary, it is written as follows. From 24:00 on the first Saturday
++# in May, until 0:00 on the day after the second Saturday in September.
+ # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+-Rule Japan 1948 only - May Sun>=1 2:00 1:00 D
+-Rule Japan 1948 1951 - Sep Sat>=8 2:00 0 S
+-Rule Japan 1949 only - Apr Sun>=1 2:00 1:00 D
+-Rule Japan 1950 1951 - May Sun>=1 2:00 1:00 D
+-# but the only locations using it (for birth certificates, presumably, since
+-# their audience is astrologers) were US military bases. For now, assume
+-# that for most purposes daylight-saving time was observed; otherwise, what
+-# would have been the point of the 1951 poll?
++Rule Japan 1948 only - May Sat>=1 24:00 1:00 D
++Rule Japan 1948 1951 - Sep Sun>=9 0:00 0 S
++Rule Japan 1949 only - Apr Sat>=1 24:00 1:00 D
++Rule Japan 1950 1951 - May Sat>=1 24:00 1:00 D
+
+ # From Hideyuki Suzuki (1998-11-09):
+ # 'Tokyo' usually stands for the former location of Tokyo Astronomical
+@@ -1505,7 +1505,7 @@
+ #
+ # ...the Showa Emperor announced Ordinance No. 529 of Showa Year 12 ... which
+ # means the whole Japan territory, including later occupations, adopt Japan
+-# Central Time (UTC+9). The adoption began on Oct 1, 1937.
++# Central Time (UT+9). The adoption began on Oct 1, 1937.
+ # https://ja.wikisource.org/wiki/明治二十八年勅令第百六十七號標準時ニ關スル件中改正ノ件
+
+ # Zone NAME GMTOFF RULES FORMAT [UNTIL]
+@@ -2066,8 +2066,8 @@
+
+ # Maldives
+ # Zone NAME GMTOFF RULES FORMAT [UNTIL]
+-Zone Indian/Maldives 4:54:00 - LMT 1880 # Male
+- 4:54:00 - MMT 1960 # Male Mean Time
++Zone Indian/Maldives 4:54:00 - LMT 1880 # Malé
++ 4:54:00 - MMT 1960 # Malé Mean Time
+ 5:00 - +05
+
+ # Mongolia
+--- contrib/tzdata/australasia.orig
++++ contrib/tzdata/australasia
+@@ -683,8 +683,8 @@
+ # From Steffen Thorsen (2012-07-25)
+ # ... we double checked by calling hotels and offices based in Tokelau asking
+ # about the time there, and they all told a time that agrees with UTC+13....
+-# Shanks says UTC-10 from 1901 [but] ... there is a good chance the change
+-# actually was to UTC-11 back then.
++# Shanks says UT-10 from 1901 [but] ... there is a good chance the change
++# actually was to UT-11 back then.
+ #
+ # From Paul Eggert (2012-07-25)
+ # A Google Books snippet of Appendix to the Journals of the House of
+@@ -1450,7 +1450,7 @@
+ #
+ # From Paul Eggert (2006-03-22):
+ # The Department of Internal Affairs (DIA) maintains a brief history,
+-# as does Carol Squires; see tz-link.htm for the full references.
++# as does Carol Squires; see tz-link.html for the full references.
+ # Use these sources in preference to Shanks & Pottenger.
+ #
+ # For Chatham, IATA SSIM (1991/1999) gives the NZ rules but with
+--- contrib/tzdata/backzone.orig
++++ contrib/tzdata/backzone
+@@ -145,11 +145,6 @@
+ Zone Africa/Harare 2:04:12 - LMT 1903 Mar
+ 2:00 - CAT
+
+-# South Sudan
+-Zone Africa/Juba 2:06:24 - LMT 1931
+- 2:00 Sudan CA%sT 2000 Jan 15 12:00
+- 3:00 - EAT
+-
+ # Uganda
+ Zone Africa/Kampala 2:09:40 - LMT 1928 Jul
+ 3:00 - EAT 1930
+@@ -242,11 +237,6 @@
+ 0:00 - GMT 1934 Feb 26
+ 1:00 - WAT
+
+-# São Tomé and Príncipe
+-Zone Africa/Sao_Tome 0:26:56 - LMT 1884
+- -0:36:32 - LMT 1912 # Lisbon Mean Time
+- 0:00 - GMT
+-
+ # Mali (northern)
+ Zone Africa/Timbuktu -0:12:04 - LMT 1912
+ 0:00 - GMT
+--- contrib/tzdata/europe.orig
++++ contrib/tzdata/europe
+@@ -68,6 +68,7 @@
+ # 0:00 WET WEST WEMT Western Europe
+ # 0:19:32.13 AMT* NST* Amsterdam, Netherlands Summer (1835-1937)
+ # 1:00 BST British Standard (1968-1971)
++# 1:00 IST GMT Irish Standard (1968-) with winter DST
+ # 1:00 CET CEST CEMT Central Europe
+ # 1:00:14 SET Swedish (1879-1899)
+ # 1:36:34 RMT* LST* Riga, Latvian Summer (1880-1926)*
+@@ -74,8 +75,8 @@
+ # 2:00 EET EEST Eastern Europe
+ # 3:00 MSK MSD MDST* Moscow
+
+-# From Peter Ilieve (1994-12-04),
+-# The original six [EU members]: Belgium, France, (West) Germany, Italy,
++# From Peter Ilieve (1994-12-04), re EEC/EC/EU members:
++# The original six: Belgium, France, (West) Germany, Italy,
+ # Luxembourg, the Netherlands.
+ # Plus, from 1 Jan 73: Denmark, Ireland, United Kingdom.
+ # Plus, from 1 Jan 81: Greece.
+@@ -278,16 +279,31 @@
+ # The following claim by Shanks & Pottenger is possible though doubtful;
+ # we'll ignore it for now.
+ # * Dublin's 1971-10-31 switch was at 02:00, even though London's was 03:00.
++
++# From Paul Eggert (2017-12-04):
+ #
++# Dunsink Observatory (8 km NW of Dublin's center) was to Dublin as
++# Greenwich was to London. For example:
+ #
+-# Whitman says Dublin Mean Time was -0:25:21, which is more precise than
+-# Shanks & Pottenger.
+-# Perhaps this was Dunsink Observatory Time, as Dunsink Observatory
+-# (8 km NW of Dublin's center) seemingly was to Dublin as Greenwich was
+-# to London. For example:
+-#
+ # "Timeball on the ballast office is down. Dunsink time."
+ # -- James Joyce, Ulysses
++#
++# The abbreviation DMT stood for "Dublin Mean Time" or "Dunsink Mean Time";
++# this being Ireland, opinions differed.
++#
++# Whitman says Dublin/Dunsink Mean Time was UT-00:25:21, which agrees
++# with measurements of recent visitors to the Meridian Room of Dunsink
++# Observatory; see Malone D. Dunsink and timekeeping. 2016-01-24.
++# <https://www.maths.tcd.ie/~dwmalone/time/dunsink.html>. Malone
++# writes that the Nautical Almanac listed UT-00:25:22 until 1896, when
++# it moved to UT-00:25:21.1 (I confirmed that the 1893 edition used
++# the former and the 1896 edition used the latter). Evidently the
++# news of this change propagated slowly, as Milne 1899 still lists
++# UT-00:25:22 and cites the International Telegraph Bureau. As it is
++# not clear that there was any practical significance to the change
++# from UT-00:25:22 to UT-00:25:21.1 in civil timekeeping, omit this
++# transition for now and just use the latter value, omitting its
++# fraction since our format cannot represent fractions.
+
+ # "Countess Markievicz ... claimed that the [1916] abolition of Dublin Mean Time
+ # was among various actions undertaken by the 'English' government that
+@@ -347,12 +363,28 @@
+ # regulations. I spoke this morning with the Secretary of the Department of
+ # Justice (tel +353 1 678 9711) who confirmed to me that the correct name is
+ # "Irish Summer Time", abbreviated to "IST".
++#
++# From Paul Eggert (2017-12-07):
++# The 1996 anonymous contributor's goal was to determine the correct
++# abbreviation for summer time in Dublin and so the contributor
++# focused on the "IST", not on the "Irish Summer Time". Though the
++# "IST" was correct, the "Irish Summer Time" appears to have been an
++# error, as Ireland's Standard Time (Amendment) Act, 1971 states that
++# standard time in Ireland remains at UT +01 and is observed in
++# summer, and that Greenwich mean time is observed in winter. (Thanks
++# to Derick Rethans for pointing out the error.) That is, when
++# Ireland amended the 1968 act that established UT +01 as Irish
++# Standard Time, it left standard time unchanged and established GMT
++# as a negative daylight saving time in winter. So, in this database
++# IST stands for Irish Summer Time for timestamps before 1968, and for
++# Irish Standard Time after that. See:
++# http://www.irishstatutebook.ie/eli/1971/act/17/enacted/en/print
+
+ # Michael Deckers (2017-06-01) gave the following URLs for Ireland's
+ # Summer Time Act, 1925 and Summer Time Orders, 1926 and 1947:
+-# http://www.irishstatutebook.ie/eli/1925/act/8/enacted/en/print.html
+-# http://www.irishstatutebook.ie/eli/1926/sro/919/made/en/print.html
+-# http://www.irishstatutebook.ie/eli/1947/sro/71/made/en/print.html
++# http://www.irishstatutebook.ie/eli/1925/act/8/enacted/en/print
++# http://www.irishstatutebook.ie/eli/1926/sro/919/made/en/print
++# http://www.irishstatutebook.ie/eli/1947/sro/71/made/en/print
+
+ # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+ # Summer Time Act, 1916
+@@ -476,9 +508,23 @@
+ Link Europe/London Europe/Guernsey
+ Link Europe/London Europe/Isle_of_Man
+
++# From Paul Eggert (2018-01-19):
++# The following is like GB-Eire and EU, except with standard time in
++# summer and negative daylight saving time in winter.
++# Although currently commented out, this will need to become uncommented
++# once the ICU/OpenJDK workaround is removed; see below.
++# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
++#Rule Eire 1971 only - Oct 31 2:00u -1:00 GMT
++#Rule Eire 1972 1980 - Mar Sun>=16 2:00u 0 IST
++#Rule Eire 1972 1980 - Oct Sun>=23 2:00u -1:00 GMT
++#Rule Eire 1981 max - Mar lastSun 1:00u 0 IST
++#Rule Eire 1981 1989 - Oct Sun>=23 1:00u -1:00 GMT
++#Rule Eire 1990 1995 - Oct Sun>=22 1:00u -1:00 GMT
++#Rule Eire 1996 max - Oct lastSun 1:00u -1:00 GMT
++
+ # Zone NAME GMTOFF RULES FORMAT [UNTIL]
+ Zone Europe/Dublin -0:25:00 - LMT 1880 Aug 2
+- -0:25:21 - DMT 1916 May 21 2:00s # Dublin MT
++ -0:25:21 - DMT 1916 May 21 2:00s
+ -0:25:21 1:00 IST 1916 Oct 1 2:00s
+ 0:00 GB-Eire %s 1921 Dec 6 # independence
+ 0:00 GB-Eire GMT/IST 1940 Feb 25 2:00s
+@@ -487,16 +533,33 @@
+ 0:00 1:00 IST 1947 Nov 2 2:00s
+ 0:00 - GMT 1948 Apr 18 2:00s
+ 0:00 GB-Eire GMT/IST 1968 Oct 27
++# From Paul Eggert (2018-01-18):
++# The next line should look like this:
++# 1:00 Eire IST/GMT
++# However, in January 2018 we discovered that the Eire rules cause
++# problems with tests for ICU:
++# https://mm.icann.org/pipermail/tz/2018-January/025825.html
++# and with tests for OpenJDK:
++# https://mm.icann.org/pipermail/tz/2018-January/025822.html
++# To work around this problem, use a traditional approximation for
++# time stamps after 1971-10-31 02:00 UTC, to give ICU and OpenJDK
++# developers breathing room to fix bugs. This approximation has
++# correct UTC offsets, but results in tm_isdst flags are the reverse
++# of what they should be. This workaround is temporary and should be
++# removed reasonably soon.
+ 1:00 - IST 1971 Oct 31 2:00u
+ 0:00 GB-Eire GMT/IST 1996
+ 0:00 EU GMT/IST
++# End of workaround for ICU and OpenJDK bugs.
+
++
+ ###############################################################################
+
+ # Europe
+
+-# EU rules are for the European Union, previously known as the EC, EEC,
+-# Common Market, etc.
++# The following rules are for the European Union and for its
++# predecessor organization, the European Communities.
++# For brevity they are called "EU rules" elsewhere in this file.
+
+ # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+ Rule EU 1977 1980 - Apr Sun>=1 1:00u 1:00 S
+@@ -929,7 +992,7 @@
+ # The page http://www.retsinfo.dk/_GETDOCI_/ACCN/A18930008330-REGL
+ # confirms this, and states that the law was put forth 1893-03-29.
+ #
+-# The EU treaty with effect from 1973:
++# The EU [actually, EEC and Euratom] treaty with effect from 1973:
+ # http://www.retsinfo.dk/_GETDOCI_/ACCN/A19722110030-REGL
+ #
+ # This provoked a new law from 1974 to make possible summer time changes
+@@ -985,9 +1048,10 @@
+ # East Greenland and Franz Josef Land, but we don't know their time zones.
+ # My source for this is Wilhelm Dege's book mentioned under Svalbard.
+ #
+-# From Paul Eggert (2006-03-22):
+-# Greenland joined the EU as part of Denmark, obtained home rule on 1979-05-01,
+-# and left the EU on 1985-02-01. It therefore should have been using EU
++# From Paul Eggert (2017-12-10):
++# Greenland joined the European Communities as part of Denmark,
++# obtained home rule on 1979-05-01, and left the European Communities
++# on 1985-02-01. It therefore should have been using EU
+ # rules at least through 1984. Shanks & Pottenger say Scoresbysund and Godthåb
+ # used C-Eur rules after 1980, but IATA SSIM (1991/1996) says they use EU
+ # rules since at least 1991. Assume EU rules since 1980.
+@@ -1301,7 +1365,7 @@
+ # From Markus Kuhn (1998-09-29):
+ # The German time zone web site by the Physikalisch-Technische
+ # Bundesanstalt contains DST information back to 1916.
+-# [See tz-link.htm for the URL.]
++# [See tz-link.html for the URL.]
+
+ # From Jörg Schilling (2002-10-23):
+ # In 1945, Berlin was switched to Moscow Summer time (GMT+4) by
+@@ -1398,7 +1462,7 @@
+ 1:00 Greece CE%sT 1944 Apr 4
+ 2:00 Greece EE%sT 1981
+ # Shanks & Pottenger say it switched to C-Eur in 1981;
+- # go with EU instead, since Greece joined it on Jan 1.
++ # go with EU rules instead, since Greece joined Jan 1.
+ 2:00 EU EE%sT
+
+ # Hungary
+@@ -2097,7 +2161,7 @@
+ # IATA SSIM (1991/1992) reports that the Azores were at -1:00.
+ # IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00.
+ # Guess that the Azores changed to EU rules in 1992 (since that's when Portugal
+-# harmonized with the EU), and that they stayed +0:00 that winter.
++# harmonized with EU rules), and that they stayed +0:00 that winter.
+ #
+ # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+ # DSH writes that despite Decree 1,469 (1915), the change to the clocks was not
+@@ -2772,9 +2836,9 @@
+ #
+ # https://regnum.ru/news/society/1957270.html
+ # has some historical data for Altai Krai:
+-# before 1957: west part on UTC+6, east on UTC+7
+-# after 1957: UTC+7
+-# since 1995: UTC+6
++# before 1957: west part on UT+6, east on UT+7
++# after 1957: UT+7
++# since 1995: UT+6
+ # http://barnaul.rusplt.ru/index/pochemu_altajskij_kraj_okazalsja_v_neprivychnom_chasovom_pojase-17648.html
+ # confirms that and provides more details including 1995-05-28 transition date.
+
+@@ -3582,6 +3646,17 @@
+ # The change is permanent, so this is the new standard time in Turkey.
+ # It takes effect today, which is not much notice.
+
++# From Kıvanç Yazan (2017-10-28):
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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