docs/129263: Obsolete info on collecting a crash dump prior to "dumpon"

[Frank Solensky]

>Number:         129263
>Category:       docs
>Synopsis:       Obsolete info on collecting a crash dump prior to "dumpon"
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-doc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Nov 28 18:40:02 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Frank Solensky
>Release:        FreeBSD 7.1 Beta2
>Organization:
>Environment:
n/a
>Description:
http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html#KERNELDEBUG-OBTAIN. The second paragraph of "Configuring the Dump Device" is as follows:

  Alternatively, the dump device can be hard-coded via the dump clause in the
  config(5) line of a kernel configuration file. This approach is deprecated and
  should be used only if a kernel is crashing before dumpon(8) can be executed.

It's more than deprecated.  Running "config" off a kernel configuration file with "config dump <device>" included results in a "root/dump/swap specification obsolete" error.

>How-To-Repeat:

>Fix:


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