Pass through user-supplied content in /join/$room_id

It was always intended to allow custom keys on the join event, but this has
at some point been lost. Restore it.

If the user specifies keys like "avatar_url" then they will be clobbered.

1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py

index 89c3895118..0d81757010 100644
--- a/synapse/rest/client/v1/room.py
+++ b/synapse/rest/client/v1/room.py
@@ -268,6 +268,7 @@ class JoinRoomAliasServlet(ClientV1RestServlet):
             action="join",
             txn_id=txn_id,
             remote_room_hosts=remote_room_hosts,
+            content=content,
             third_party_signed=content.get("third_party_signed", None),
         )