Add OMD stats conversion script

stats2omd.py

+#!/bin/env python
+import sys
+try:
+    import json
+except ImportError:
+    import simplejson as json
+
+data = json.load(sys.stdin)
+
+#  "security": {
+#    "owners": 2,
+#    "messages_held": 3,
+#    "members": 11,
+#    "list_fqdn_name": "security@lists.med.stanford.edu",
+#    "last_digest": "2010-10-27T23:04:25.346716",
+#    "nonmembers": 134,
+#    "subscription_requests": 0,
+#    "last_post": "2010-10-27T23:04:29.843071",
+#    "moderators": 4
+#  }
+
+# 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}\n".format(
+        list_name=list_name, **data[list_name]))