Fixed #4227 ispconfig_update.sh script finish with errors

server/scripts/ispconfig_update.php

@@ -94,7 +94,7 @@ if($method == 'stable') {
 	$new_version = @file_get_contents('http://www.ispconfig.org/downloads/ispconfig3_version.txt') or die('Unable to retrieve version file.');
 	$new_version = trim($new_version);
 	if(version_compare($new_version, ISPC_APP_VERSION, '>')) {
-		passthru('/usr/local/ispconfig/server/scripts/update_from_tgz.sh');
+		passthru('/usr/local/ispconfig/server/scripts/update_stable.sh');
 		exit;
 	} else {
 		echo "There are no updates available for ISPConfig ".ISPC_APP_VERSION."\n";

server/scripts/update_from_tgz.sh → server/scripts/update_stable.sh

 #!/bin/bash
-
+{
 {
     umask 0077 \
     && tmpdir=`mktemp -dt "$(basename $0).XXXXXXXXXX"` \
@@ -28,3 +28,4 @@ else
 fi
 
 exit 0
+}