Typo fix

Author: JanThiel

server/lib/classes/letsencrypt.inc.php

@@ -159,8 +159,8 @@ public function get_certbot_command($domains) {
 				$webroot_map[$domains[$i]] = '/usr/local/ispconfig/interface/acme';
 			}
 			$webroot_args = "--webroot-map " . escapeshellarg(str_replace(array("\r", "\n"), '', json_encode($webroot_map)));
-			// --cert-name might be working with earlier versions of certbot, but there is no safe version since when
-			// Sot for safety reasons we add it to the 0.30 version check as it is documented to work as expected in this version
+			// --cert-name might be working with earlier versions of certbot, but there is no exact version documented
+			// So for safety reasons we add it to the 0.30 version check as it is documented to work as expected in this version
 			$cert_selection_command = "--cert-name $primary_domain";
 		} else {
 			$webroot_args = "$cmd --webroot-path /usr/local/ispconfig/interface/acme";