I see some strange behavior on my webServer.
Trying to get keeWeb to accept a file from a webDAV share on a different server. 
If I want to add a WebDAV File which is entered in Form of:

```
https://FQDN:8443/webdav/file.kdbx

```

I see the following Headers (FF Developer Tools Headers -> Response Headers):

```
Access-Control-Allow-Origin:"*"
Access-Control-Allow-Methods:"GET, HEAD, POST, PUT, OPTIONS, MOVE, DELETE, COPY, LOCK, UNLOCK"
Access-Control-Allow-Headers:"origin, content-type, cache-control, accept, authorization, if-match, destination, overwrite"
Access-Control-Allow-Credentials:"true"

```

BUT, in the Network Tab i can see an 401:
Request Method: Options
Status Code: 401 Unauthorized

It seems like the CORS headers get added but the rewrite does not work. My Apache Config:

```
<Directory /var/www/html/webdav>

Header always set Access-Control-Allow-Origin *
Header always set Access-Control-Allow-Headers "origin, content-type, cache-control, accept, authorization, if-match, destination, overwrite"
Header always set Access-Control-Expose-Headers "ETag"
Header always set Access-Control-Allow-Methods "GET, HEAD, POST, PUT, OPTIONS, MOVE, DELETE, COPY, LOCK, UNLOCK"
Header always set Access-Control-Allow-Credentials "true"

RewriteEngine On
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteRule ^(.*)$ $1 [R=200,L]

        DAV On
        AuthType Basic
        AuthName "Authentication Required"
        AuthUserFile /etc/httpd/.htpasswd
        Require valid-user
</Directory>

```

Did i miss something or could it be that on the Rewrite does not work on Apache/2.4.6 (CentOS).
I really have no idea how to debug a rewrite. Is there a way to trace such things?