ctdb-recoverd: Skip known IP address checking when it is disabled

ctdb-recoverd: Skip known IP address checking when it is disabled

When public IP checking is disabled, verify_local_ip_allocation()
still retrieves known IP addresses and runs through a loop that does
nothing.

Instead, completely skip the retrieval and checking loop.

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