Version 1.3.3 * authentication: always use UTF-8 instead of ISO-8859-1 for Basic credentials to implements RFC 7617 * contact sync: remove "disable RFC 6868" option (RFC 6868 is now always enabled) * event sync: don't set event classification (CLASS:PRIVATE) when "privacy" is "default" * task sync: ignore invalid DUE values which are before DTSTART * minor bug fixes and improvements (including internal refactoring)