• iTip auto-processing

I suppose it depends on the webserver/proxy setup, but using the url without a trailing slash seems odd to me, so I would just add it here.

• Add missing app.debug check

• Use event subscriber feature, cleanup

• Use MessageClass=IPM.Schedule.Meeting.Resp.*

• Use MessageClass=IPM.Schedule.Meeting.Canceled

• MeetingResponse: Handle event cancellations

I don't have good answers to the raised questions, but it seems like this is better than previously doing nothing (almost).

• Fix MeetingResponse handling on a recurring event occurrence

Looks like fixed versions have been rolled out.

Fixed.