Configuration/settings/use old sync response tag
$c->use_old_sync_response_tag = true;
If set to true, then the WebDAV Sync REPORT will use DAV::sync-response rather than DAV::response.
This is needed by the Inverse CardDAV plugin from SOGo - at least until they get support for the -03 release of WebDAV sync.
It's probably a bad idea to use this setting, since the sync format has changed significantly and SOGo really needs to update their support for it.
Removed in 0.9.9.4