New csf v2.91

Changes:

• Added Fedora Core v6 to the obsolete OS check
• Added php v4 check
• Added apache v2.2 check
• Added Perl v5.8.8 check
• Added cPanel v11 check
• Modified Sys::Syslog use to utilise the ndelay and nofatal options
• Added new option GLOBAL_IGNORE which makes lfd ignore IP’s listed in a globally located ignore file
• Modified Connection Tracking so that lfd doesn’t block IP addresses that resolve to *.cpanel.net (to prevent CT_LIMIT being triggered during a upcp upgrade of cPanel)
• Added new option CT_STATES to Connection Tracking so that you can specify which connection states you want to count towards CT_LIMIT, e.g. SYN_RECV