s3: smbd: Locking - re-add pending lock records if we fail to acquire a lock (and...

s3: smbd: Locking - re-add pending lock records if we fail to acquire a lock (and the lock hasn't timed out).

Keep the blocking lock record and the pending lock records consistent
if we are dealing with multiple blocking lock requests in one SMB1 LockingX
request.

Ensure we re-add the records under the record lock, to avoid race
conditions.

Bug #10684 - SMB1 blocking locks can fail notification on unlock, causing client timeout.

https://bugzilla.samba.org/show_bug.cgi?id=10684

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <Volker.Lendecke@SerNet.DE>