r17710: Thanks to Thomas Bork for testing and continued feedback on this.

r17710: Thanks to Thomas Bork for testing and continued feedback on this.

Comments from the patch:

/* Add the "Unix Group" SID for each gid to catch mapped groups
   and their Unix equivalent.  This is to solve the backwards
   compatibility problem of 'valid users = +ntadmin' where
   ntadmin has been paired with "Domain Admins" in the group
   mapping table.  Otherwise smb.conf would need to be changed
   to 'valid user = "Domain Admins"'.  --jerry */
(This used to be commit 3848199287c5829aef66d0dee38a79056fe1ff5c)