New csf v2.39

Changes:

• Added OS check to Security Check to warn if using RH7/9 FC1/2 which are no longer supported (or about to be retired)
• Made lfd more lenient when it cannot open a log file (reports the error but continues to function)
• PHP Server Check – if /opt/suphp_php_bin/php.ini exists use that for php settings
• Added new option RELAYHOSTS to csf.conf which allows you to automatically allow access to IP’s listed in /etc/relayhosts at a specified interval