discourse/discourse — pull request #2989 by jmay (2014-11-20 17:34:35+00:00)
Title: API addition: HTTP PATCH support for /groups/xxx: incremental membership changes

New API to allow for incremental group membership adds/removes so that we can deal with groups with over 200 members. The existing PUT API requires transferring the entire membership list for every update. This does not replace the existing PUT. The UI needs to be updated to support this API change.