Errors in automatically generated nginx configuration files (Fixes #3774)

install/tpl/nginx_apps.vhost.master

 server {
-        listen {apps_vhost_ip};
+        listen {apps_vhost_port};
         listen [::]:{apps_vhost_port};
         ssl {ssl_on};
         {ssl_comment}ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

install/tpl/nginx_ispconfig.vhost.master

 server {
         listen {vhost_port};
-        listen [::]:{vhost_port}
+        listen [::]:{vhost_port};
 		ssl {ssl_on};
 		{ssl_comment}ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
         {ssl_comment}ssl_certificate /usr/local/ispconfig/interface/ssl/ispserver.crt;
@@ -81,4 +81,4 @@ server {
 #        location /webmail {
 #               rewrite ^/* /squirrelmail last;
 #        }
-}
\ No newline at end of file
+}