bin/37733: su(1) does not behave the way it is described in man

[linimon at FreeBSD.org]

Synopsis: su(1) does not behave the way it is described in man

State-Changed-From-To: open->closed
State-Changed-By: linimon
State-Changed-When: Sat Jan 26 00:54:41 UTC 2008
State-Changed-Why: 
It sounds to me like su does indeed describe the current behavior.
If your primary group is 0, then indeed you are in group 0 :-)  I read
it as /etc/groups being _additional_ groups that a user is in.

If there is a need to create a group which can read but not modify
logs, then IMHO that's a local site decision and it should be a group
other than group 0.  Changing the meaning of group 0 would be a POLA
violation (at least at lonesome.com).

http://www.freebsd.org/cgi/query-pr.cgi?pr=37733