Exclude dormant users from the buddy list.

You must have accessed Zulip in the last 45 days to show up
on the list.

(imported from commit ebfaeb97ffda22b618be7a9206877f9d2ec53404)

zerver/models.py

@@ -28,6 +28,7 @@ import pylibmc
 import re
 import ujson
 import logging
+import datetime
 
 bugdown = None
 
@@ -1152,7 +1153,9 @@ class UserPresence(models.Model):
     def get_status_dict_by_realm(realm_id):
         user_statuses = defaultdict(dict)
 
+        dormancy_cutoff_date = datetime.datetime.now() - datetime.timedelta(days=45)
         query = UserPresence.objects.filter(
+                timestamp__gte=dormancy_cutoff_date,
                 user_profile__realm_id=realm_id,
                 user_profile__is_active=True,
                 user_profile__is_bot=False