1.6. Vendor F Testing

For the first time, server to server functionality was tested between 3 vendors and many issues were fixed in time for a demo at the end of the interop.

Floating event issues were discovered when doing tests with one vendor.

Overall it was a very interesting interop mostly due to the new server to server functionality. There should put extra effort put into inviting more CalDAV client implementors in the upcoming interop events.