More review comments.
@@ -77,7 +77,7 @@ servers.
A chosen resident homeserver might also be unable to issue invites (which, as below,
is a pre-requisite for generating a correctly-signed join event). In this case
it should return an error response with HTTP status code of 400 and an `errcode`
-of `M_CANNOT_ALLOW`. The joining server should attempt to join via another
+of `M_UNABLE_TO_GRANT_JOIN`. The joining server should attempt to join via another
resident homeserver.
From the perspective of the [auth rules](https://spec.matrix.org/unstable/rooms/v1/#authorization-rules),
@@ -88,9 +88,9 @@ caveat that servers must ensure that:
* The join event has a valid signature from a homeserver whose users have the
power to issue invites.
- When generating a join event the server should include the MXID of a local user
- who could issue an invite in the content with the key
- `join_authorised_via_users_server`. The actual user chosen is arbitrary.
+ When generating a join event for `/join` or `/make_join`, the server should
+ include the MXID of a local user who could issue an invite in the content with
+ the key `join_authorised_via_users_server`. The actual user chosen is arbitrary.
This implies that:
