Finish implementing single monitor mod

scripts/zmaudit.pl.in

@@ -227,6 +227,10 @@ MAIN: while( $loop ) {
         Debug("Weird non digit characters in $monitor");
         next;
       }
+      if ( $monitor_id and ( $monitor_id != $monitor ) ) {
+        Debug("Skipping monitor $monitor because we are only interested in monitor $monitor_id");
+        next;
+      }
 
       Debug( "Found filesystem monitor '$monitor'" );
       $fs_monitors->{$monitor} = {} if ! $fs_monitors->{$monitor};
@@ -808,6 +812,7 @@ yet.
  -c, --continuous           - Run continuously
  -f, --force                - Run even if pid file exists
  -i, --interactive          - Ask before applying any changes
+ -m, --monitor_id           - Only consider the given monitor
  -r, --report               - Just report don't actually do anything
  -s, --storage_id           - Specify a storage area to audit instead of all
  -v, --version              - Print the installed version of ZoneMinder