Merge branch 'master' into interface

3dparty/HTTP/WebDAV/Server.php

3dparty/HTTP/WebDAV/Tools/_parse_lockinfo.php

3dparty/HTTP/WebDAV/Tools/_parse_propfind.php

3dparty/HTTP/WebDAV/Tools/_parse_proppatch.php

3dparty/Sabre.autoload.php

3dparty/Sabre.includes.php

3dparty/Sabre/CalDAV/Backend/Abstract.php

3dparty/Sabre/CalDAV/Backend/PDO.php

3dparty/Sabre/CalDAV/Calendar.php

3dparty/Sabre/CalDAV/CalendarObject.php

3dparty/Sabre/CalDAV/CalendarRootNode.php

3dparty/Sabre/CalDAV/Exception/InvalidICalendarObject.php

3dparty/Sabre/CalDAV/ICSExportPlugin.php

3dparty/Sabre/CalDAV/ICalendarUtil.php

3dparty/Sabre/CalDAV/Plugin.php

3dparty/Sabre/CalDAV/Principal/Collection.php

3dparty/Sabre/CalDAV/Principal/ProxyRead.php

3dparty/Sabre/CalDAV/Principal/ProxyWrite.php

3dparty/Sabre/CalDAV/Principal/User.php

...y/Sabre/CalDAV/Property/SupportedCalendarComponentSet.php