docs/159650: dumpdev variable was changed to "no" on September 2009

[Jeremy Chadwick]

>Number:         159650
>Category:       docs
>Synopsis:       dumpdev variable was changed to "no" on September 2009
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-doc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Aug 10 17:10:09 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Jeremy Chadwick
>Release:        FreeBSD 8.2-STABLE amd64
>Organization:
>Environment:
System: FreeBSD icarus.home.lan 8.2-STABLE FreeBSD 8.2-STABLE #0: Mon Aug 8 07:16:45 PDT 2011 root at icarus.home.lan:/usr/obj/usr/src/sys/X7SBA_RELENG_8_amd64 amd64
>Description:
	In the following freebsd-stable@ discussion thread, the "dumpdev"
	rc.conf variable and its defaults have come under scrutiny:

	http://lists.freebsd.org/pipermail/freebsd-stable/2011-August/063543.html

	In September 2009 a commit was made to change the default value of
	dumpdev from "AUTO" to "NO":

	http://www.freebsd.org/cgi/cvsweb.cgi/src/etc/defaults/rc.conf#rev1.358.2.2

	Yet the FreeBSD Handbook "Kernel Debugging" section 10.1.1 states:

	"AUTO is the default as of FreeBSD 6.0."

	Which is no longer true for any release/build past September 2009 (sans
	HEAD/CURRENT, where "AUTO" is still the default).
>How-To-Repeat:
	n/a
>Fix:
	Please update the Handbook to reflect reality.  :-)  Someone will need
	to review the RELENG_7 tag to see if/when src/etc/defaults/rc.conf was
	changed there as well.


>Release-Note:
>Audit-Trail:
>Unformatted: