add DELETE verb to nextcloud-whitelist.yaml for dav (#1786)

fixes #1519

Co-authored-by: Thibault "bui" Koechlin <thibault@crowdsec.net>

Author: 50thomatoes50

parsers/s02-enrich/crowdsecurity/nextcloud-whitelist.yaml

@@ -8,7 +8,7 @@ whitelist:
    - evt.Meta.http_status == '404' && evt.Meta.http_verb == 'GET' && evt.Meta.http_path contains '/apps/files_versions/preview' && evt.Parsed.http_args contains 'version' #Backup app missing file version
    - evt.Meta.http_status == '404' && evt.Meta.http_verb == 'GET' && evt.Meta.http_path contains '/apps/photos/api/v1/preview' && evt.Parsed.http_args contains 'x' && evt.Parsed.http_args contains 'y' #Photo app loads all previews as small panes, but can 404
    - evt.Meta.http_status == '404' && evt.Meta.http_verb == 'GET' && evt.Parsed.request contains '/core/preview' && evt.Parsed.http_args contains 'x=' && evt.Parsed.http_args contains 'y=' && evt.Parsed.http_args contains 'fileId=' #File preview often 404s while searching
-   - evt.Meta.http_status in ['404', '200'] && evt.Meta.http_verb in ['PROPFIND', 'GET'] && evt.Meta.http_path matches '^/remote.php/(web)?dav/' #Uploading new files via WebDAV always produces a 404
+   - evt.Meta.http_status in ['404', '200'] && evt.Meta.http_verb in ['PROPFIND', 'GET', 'DELETE'] && evt.Meta.http_path matches '^/remote.php/(web)?dav/' #Uploading new files via WebDAV always produces a 404
    - evt.Meta.http_status == '404' && evt.Meta.http_verb == 'PROPFIND' && evt.Parsed.file_dir startsWith '/public.php/webdav/' && lower(evt.Parsed.file_name) in ['readme.md', 'lisez%20moi.md'] # Resharing scans for readme to check existence
    - evt.Meta.http_status in ['200', '204', '404', '400'] && evt.Meta.http_verb == 'GET' && evt.Meta.http_path matches '/apps/mail/api/avatars/(url|image)/' #When loading mail contacts the avatars may get 404, or if you have a lot of contacts, it may trigger crawl-non-static
    - evt.Meta.http_status == '200' && evt.Parsed.static_ressource == 'false' && evt.Meta.http_verb == 'GET' && evt.Meta.http_path contains '/apps/photos/api/v1/preview' && evt.Parsed.http_args contains '&x=' && evt.Parsed.http_args contains '&y=' && evt.Parsed.http_args contains 'etag=' #When loading multiple images inside Nextcloud Photos, HTTP Crawl non statics is triggered since the images look like dynamic assets.