svn commit: r314946 - head/usr.sbin/ntp

[Cy Schubert]

Author: cy
Date: Thu Mar  9 05:29:24 2017
New Revision: 314946
URL: https://svnweb.freebsd.org/changeset/base/314946

Log:
  Configure leap-second smearing (always).
  
  Leap-second smearing is an experimental option that may be specified in
  ntp.conf(5) and the -x option on the command line to spread the effect
  of a leap-second over an interval as specified by the leapsmearinterval
  config file statement. Recommended values are between 7200 (2 hours) and
  86400 (24 hours).
  
  It is advised that leap-second smearing not be used for public NTP
  servers (https://www.meinbergglobal.com/download/burnicki/Leap\
  %20Second%20Smearing%20With%20NTP.pdf). It is also advised that NTP
  clients not use a mix of NTP servers using leap-second smearing with
  NTP servers not using leap-second smearing as that could cause
  undefined client behaviour.
  
  Leap-second smearing was committed to ports net/ntp and net/ntp-devel
  by r426825 on 2016-11-22.
  
  Suggested by:	des
  MFC after:	4 weeks

Modified:
  head/usr.sbin/ntp/config.h

Modified: head/usr.sbin/ntp/config.h
==============================================================================
--- head/usr.sbin/ntp/config.h	Thu Mar  9 05:13:07 2017	(r314945)
+++ head/usr.sbin/ntp/config.h	Thu Mar  9 05:29:24 2017	(r314946)
@@ -1336,7 +1336,7 @@
 #define LDAP_API_FEATURE_X_OPENLDAP_THREAD_SAFE 1
 
 /* leap smear mechanism */
-/* #undef LEAP_SMEAR */
+#define LEAP_SMEAR 1
 
 /* Define to any value to include libseccomp sandboxing. */
 /* #undef LIBSECCOMP */