Modsecurity prevents update of contacts

The default configuration of NCP with modsecurity seems to have an issue when handling vcard files.

Setup: current docker instance of NCP with modsecurity enabled, latest updates

Steps to reproduce:

1. create new contact
2. save contact (successful)
3. change contact data
4. request error 500 on saving the contact
5. data is lost after site refresh

Steps 3-5 are successfull with disabled modsecurity.

Solution:

• create exception for addressbooksync

The corresponding logfile/line: [Sat Jan 18 17:39:21.463016 2020] [:error] [pid 23201:tid 1817326624] [client xxxxxx] [client xxxxxxx] ModSecurity: XML parser error: XML: Failed parsing document. [hostname "xxxxxxxx"] [uri "/remote.php/dav/addressbooks/users/xxxxxx/xxxxxx/xxxxxx-2DA4-4988-8FC6-xxxxxxxxxx.vcf"] [unique_id "XiNCyZLwCYQ4v2CWduyWOQAAShg"]