winbindd: don't call set_domain_online_request() in the idmap child
Most idmap backends don't need access to the domain controllers.
And the related code is not needed for the backends.
Commit
17c86a2c5a5a5e2b194362e5f36f0f99910222c5 changed
the logic of set_domain_online_request() completely!
Instead of triggering a dc probe in the background,
it is now doing a blocking connection.
And doing this in the idmap child is completely useless.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15317
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit
ad242a20643c930eb00a8b700f7bd9638f8821a8)