csf no longer processing LF_SCRIPT_ALERT

Due to the changes by exim caused by CVE-2016-1531, exim no longer reports the script location that it was initiated from. This now means that LF_SCRIPT_* will no longer function.

EDIT: We have just be informed by cPanel that they have developed a workaround that will be released imminently for EXIM that should restore the functionality. Yay!