add options for monitoring limits

stats2omd.py

 #!/bin/env python
 import sys
+import argparse
 try:
     import json
 except ImportError:
     import simplejson as json
 
+parser = argparse.ArgumentParser(description='Process some integers.')
+parser.add_argument('--max-held', default=5, type=int,
+                    help='Maximum queue length for held messages')
+parser.add_argument('--max-requests', default=5, type=int,
+                    help='Maximum queue length for subscription requests')
+
+args = parser.parse_args()
+
 data = json.load(sys.stdin)
 
 #  "security": {
@@ -21,5 +30,8 @@ data = json.load(sys.stdin)
 
 # echo "1 Mailu_queue_len queue=$queued;300;500 WARNING - Can't fetch queue length"
 for list_name in data.keys():
-    print("0 Mailman_{list_name}_stats members={members}|owners={owners}|messages_held={messages_held}|nonmembers={nonmembers}|subscription_requests={subscription_requests}|moderators={moderators} OK - Stats have been processed".format(
-        list_name=list_name, **data[list_name]))
+    print("0 Mailman_{list_name}_stats members={members}|owners={owners}|messages_held={messages_held};;{max_held}|nonmembers={nonmembers}|subscription_requests={subscription_requests};;{max_requests}|moderators={moderators} OK - Stats have been processed".format(
+        list_name=list_name,
+        max_held=args.max_held,
+        max_requests=args.max_requests,
+        **data[list_name]))