zogstrip bae4cd165f
SECURITY: mutex around adding users to a group DM
Whenever you are about to reach the limit of users in a group DM, if you
send requests to add new users in parallel, they might all go through
ignoring the limit due to a race condition.

Internal - t/145895
2025-03-26 09:26:41 +08:00
..
2025-03-25 17:22:59 +01:00
2025-03-11 17:47:42 +01:00