Add session-id filter optimization to smbstatus

Add ability to filter efficiently based on session-id (PID). This is a two-part optimization. First is to add new switch to smbstatus to filter by user-provided session-id. Basically we bail out on locking tdb entries if they don't match the id so that output returned to middleware is minimized. Second, we add special handling for filter where `session_id = <pid>` to call this optimized version.