r13492: As noone objected on the mailing-list:
Fix parse_domain_user to fail when splitting a full name like "DOM\user"
when "winbind use default domain" and "winbind trusted domains only" are
not enabled.
This allows pam_winbind to behave correctly when more modules are
stacked in the "account" or "password" PAM facility. pam_winbindd calls
WINBINDD_GETPWNAM which can decide whether or not a user is a winbind
user and return correct PAM error codes.
Guenther
(This used to be commit
e6d52c1e9d8cec7be6d552c2a67a392df21c3ec9)