Update install.php to fix the condition for non-webservers to check for ispserver.crt file instead of whether apache or nginx is installed since apache might be installed together with mailman.

Author: ahrasis

install/install.php

@@ -598,10 +598,9 @@
 }
 
 // Create SSL certs for non-webserver(s)?
-if(($conf['apache']['installed'] && $conf['apache']['installed']) == false) {
-    if(strtolower($inst->simple_query('Do you want to create SSL certs for your server?', array('y', 'n'), 'y')) == 'y') {
+if(!file_exists(/usr/local/ispconfig/interface/ssl/ispserver.crt)) {
+    if(strtolower($inst->simple_query('Do you want to create SSL certs for your server?', array('y', 'n'), 'y')) == 'y')
         $inst->make_ispconfig_ssl_cert();
-    }
 }
 
 $inst->install_ispconfig();