Found in /source4/winbind/wb_cmd_getgrent.c:
#if 0 /*FIXME: implement this*/
static void cmd_getgrent_recv_user_list(struct composite_context *ctx);
- Would be needed for: admin users = @"DOM\\Domain Admins"
(at least on samba4 ad domain controller; samba member servers can use samba3 winbind)
- Lack of support for winbind enum groups is neither documented in manpage, nor in wiki
*** This bug has been marked as a duplicate of bug 9838 ***