Merge pull request #2574 from matrix-org/travis/clarification/member-profiles

Remove claim that profile info is exclusively managed by the server

changelogs/client_server/newsfragments/2574.clarification

@@ -0,0 +1 @@
+Remove claims that the homeserver is exclusively responsible for profile information in membership events.

event-schemas/schema/m.room.member

@@ -48,10 +48,10 @@ properties:
   content:
     properties:
       avatar_url:
-        description: 'The avatar URL for this user, if any. This is added by the homeserver.'
+        description: 'The avatar URL for this user, if any.'
         type: string
       displayname:
-        description: 'The display name for this user, if any. This is added by the homeserver.'
+        description: 'The display name for this user, if any.'
         type:
           - "string"
           - "null"