docs/163162: make.conf(5): Update via 'svn' incomplete described.

[Oliver Hartmann]

>Number:         163162
>Category:       docs
>Synopsis:       make.conf(5): Update via 'svn' incomplete described.
>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:   Sat Dec 10 10:20:05 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Oliver Hartmann
>Release:        FreeBSD 10.0-CURRENT/amd64
>Organization:
FU Berlin
>Environment:
>Description:
make.conf(5) describes SVN_UPDATE variable to be set for usage subversion for updating and maintainig /usr/src via "make update". But as with the recent settings and even with SVN_UPDATE set to YES in make.conf a simply "make update" typed in /usr/src will fail with a "svn not found" error, since the path to svn hasn't been properly set.
The file /usr/src/Makefile.inc1 reveals that there are to flags that could be set to target mainance via svn: SVN itself targetting the path to the svn binary and SVNFLAGS setting for the repository to be targeted. None of them are mentioned in make.conf(5) and I'd like to see some notes in make.conf(5) on that. 
>How-To-Repeat:

>Fix:


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