New csf v4.99

Changes:

• Improved csf locking to enhance the integrity of the firewall
• Log lfd csf deny failures
• New SSHD regex added
• Improved the dovecot regex’s
• New Beta option: lfd Clustering. This new set of options (CLUSTER*) in csf.conf allows the configuration of an lfd cluster environment where a group of servers can share blocks and, via the CLI, configuration option changes, allows and removes. See the readme.txt file for more information and details, setup and security implications