K 10
svn:author
V 4
bapt
K 8
svn:date
V 27
2014-10-28T14:19:17.759971Z
K 7
svn:log
V 283
Fix a regression in pw usermod -G list

The user was perperly adding the to different groups from "list" but was not
removed from the other groups it could have belong to.
While here add a regression test about this bug

PR:		185666
Reported by:	sub.mesa@gmail.com
MFC after:	1 week

END