Add sendmail to hestia php.ini

src/deb/php/php.ini

@@ -1054,7 +1054,7 @@ smtp_port = 25
 
 ; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
 ; http://php.net/sendmail-path
-;sendmail_path =
+sendmail_path=sendmail -t -i
 
 ; Force the addition of the specified parameters to be passed as extra parameters
 ; to the sendmail binary. These parameters will always replace the value of