New csf v12.09

Changes:

• Added new option CT_SUBNET_LIMIT. If the total number of connections from a class C subnet is greater than this value then the offending subnet is blocked according to the other CT_* settings. This option is disabled by default
• Removed ALTTOR from csf.blocklists on new installations as it has been discontinued
• Use ConfigServer::Slurp to read csf.resellers to avoid invalid line endings
• Modified CLUSTER_SENDTO and CLUSTER_RECVFROM so that they can be set to a file instead of listing IP’s within the respective setting. See csf.conf for more details
• Removed open_basedir check on cPanel servers in Server Check
• Fixed csf.conf typo
• Updates to Courier IMAP regexes for Plesk