ctdb-daemon: Only consider client ID for local database attach

ctdb-daemon: Only consider client ID for local database attach

The comment immediately above this code says "don't allow local
clients to attach" and then looks up the client ID regardless of
whether the request is local or remote.

This means that an intentional remote attach from a client will not
work correctly.  No real client should ever do that since clients
attach so they an access databases locally.  Perhaps some sanity
checks should be added.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13500

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>