applied a fix (but uncommented) mentioned at http://www.ip-phone-forum.de/showthread.php?t=267477&page=3&p=2028714&viewfull=1#post2028714
applied a fix (but uncommented) mentioned at http://www.ip-phone-forum.de/showthread.php?t=267477&page=3&p=2028714&viewfull=1#post2028714

ssx/php-carddav,jens-maus/CardDAV-PHP,Skyr/CardDAV-PHP,kai-c/CardDAV-PHP