- added debug log to RemoveGoogleDuplicatedContacts (e.g. to investigate root cause for https://sourceforge.net/p/googlesyncmod/support-requests/834/)
- added more debug info to UpdateRecurrence to investigate root cause for https://sourceforge.net/p/googlesyncmod/bugs/1280/
