CalDAV: use CURLOPT_NOBODY for HEAD requests
Recommended by https://www.php.net/manual/en/function.curl-setopt.php
Before the change, each HEAD was taking 5 seconds. Now it's instant (caldav side, side it's < 40 ms)
Recommended by https://www.php.net/manual/en/function.curl-setopt.php
Before the change, each HEAD was taking 5 seconds. Now it's instant (caldav side, side it's < 40 ms)