[stable9] Escape special characters (#25429)

[DeepDiver1975]

backport of (#25429)

[mention-bot]

@DeepDiver1975, thanks for your PR! By analyzing the history of the files in this pull request, we identified @blizzz, @nickvergessen and @PVince81 to be potential reviewers.

[davitol]

- ❌ TEST: custom webdav prop can be set with PROPPATCH and retrieved with PROPFIND

After applying the patch:
curl -X PROPPATCH -H "Content-Type: text/xml" --data-binary "@proppatch.txt" http://admin:Password@myserver/remote.php/webdav/aaa.txt | xmllint --format -

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   472  100   235  100   237    865    872 --:--:-- --:--:-- --:--:--   871
<?xml version="1.0" encoding="utf-8"?>
<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
  <s:exception>Sabre\DAV\Exception\NotFound</s:exception>
  <s:message>File with name aaa.txt could not be located</s:message>
</d:error>

Not sure if i'm missing some step @DeepDiver1975
Tested again and it seems to work fine, so 👍

[PVince81]

I tested LDAP with groups and it seems to work fine 👍

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.