Can't create new contacts on master

[schiessle]

Since the update to sabreDAV 3.2 on master (nextcloud/server#1792) I can't create new contacts.

cc @rullzer maybe you have a idea how to fix is, I saw that you also fixed other issues after the sabreDAV update

[nickvergessen]

<?xml version="1.0" encoding="utf-8"?>
<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
  <s:exception>Sabre\DAV\Exception\UnsupportedMediaType</s:exception>
  <s:message>Validation error in vCard: The FN property must appear in the VCARD component exactly 1 time</s:message>
</d:error>

[nickvergessen]

VCard sent is:

BEGIN:VCARD
VERSION:3.0
UID:bac8b1b9-a123-4ca2-b1ae-593d6c995814
END:VCARD

[LukasReschke]

Isn't this #8 ?

[LukasReschke]

The PR seems to miss some commits though. See https://github.com/owncloud/contacts/pull/526/files directly

[rullzer]

Fixed by #8