New csf v8.15

Changes:

• Added new configuration option IP to point to the IP binary. This will be used in preference to IFCONFIG, the latter is no longer required when the IP binary is correctly configured and executable
• Added full UI integration into CentOS Web Panel (CWP). To disable integration:
  Rename: /usr/local/cwpsrv/htdocs/resources/admin/modules/csf.orig.php
  to:     /usr/local/cwpsrv/htdocs/resources/admin/modules/csf.php
  create: /etc/csf/cwp.disable
• Updated Postfix SMTP AUTH regex (thanks to Marcele)
• Added support for /etc/csf/csf.blocklists in ZIP format. The zip file MUST only contain a single text file of a single IP/CIDR per line
• Added Stop Forum Spam (ZIP) example to csf.blocklists
• Added IPV6 support to csf.sips
• Fixed detection of ip6tables nat
• Removed development code for ispconfig from distribution as this should NOT be used. It has never been implemented nor released as a supported solution and is likely to be insecure. Upgrading will remove any installations of this development code