PHP 7.2 compatibility #2
Description
Currently this plugin works with max. PHP 7.1.
/calendar/lib/encryption.php uses mcrypt, which was deprecated in PHP 7.1 and removed in PHP 7.2. The functionality would probably need to be converted to OpenSSL. Don't know if it's possible to use same ciphers etc. so the stored passwords could still be decrypted.
Maybe there are some other issues with PHP 7.2, haven't checked.