s3/lib: fix matching interfaces with multiple assigned IPs

s3/lib: fix matching interfaces with multiple assigned IPs

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15823

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Björn Jacke <bjacke@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Wed Mar 12 01:32:30 UTC 2025 on atb-devel-224

(cherry picked from commit b85f056e7312ea9839b6fda617132fcc956da3c1)

Autobuild-User(v4-21-test): Jule Anger <janger@samba.org>
Autobuild-Date(v4-21-test): Thu Mar 20 14:50:08 UTC 2025 on atb-devel-224