- redirect md5sum STDERR to /dev/null (Fixes #3383)

Author: Marius Burkard

install/update.php

@@ -545,7 +545,7 @@
 
 //* Create md5 filelist
 $md5_filename = '/usr/local/ispconfig/security/data/file_checksums_'.date('Y-m-d_h-i').'.md5';
-exec('find /usr/local/ispconfig -type f -print0 | xargs -0 md5sum > '.$md5_filename);
+exec('find /usr/local/ispconfig -type f -print0 | xargs -0 md5sum > '.$md5_filename . ' 2>/dev/null');
 chmod($md5_filename,0700);
 
 echo "Update finished.\n";