Merge branch 'mkdirlets' into 'master'

mkdir for letsencrypt

this folder is needed by **file_put_contents** when **.well-known** is clean

See merge request !567

Author: Till Brehm

server/plugins-available/apache2_plugin.inc.php

@@ -1218,12 +1218,13 @@ function update($event_name, $data) {
 
 			// prevent duplicate
 			$temp_domains = array_unique($temp_domains);
-			
+
 			// check if domains are reachable to avoid letsencrypt verification errors
 			$le_rnd_file = uniqid('le-') . '.txt';
 			$le_rnd_hash = md5(uniqid('le-', true));
+			mkdir('/usr/local/ispconfig/interface/acme/.well-known/acme-challenge/',0750,true);
 			file_put_contents('/usr/local/ispconfig/interface/acme/.well-known/acme-challenge/' . $le_rnd_file, $le_rnd_hash);
-			
+
 			$le_domains = array();
 			foreach($temp_domains as $temp_domain) {
 				$le_hash_check = trim(@file_get_contents('http://' . $temp_domain . '/.well-known/acme-challenge/' . $le_rnd_file));