New csf v4.12

Changes:

• Modified lfd Login Failure tracking to use a per IP address rolling LF_INTERVAL window rather than a static one for all tracked IPs. This makes login failure counting more accurate and blocking more responsive
• Added new feature – Block Reporting. lfd can run an external script when it performs and IP address block following for example a login failure. BLOCK_REPORT is to the full path of the external script. See readme.txt for format details
• If csf is installed or upgraded via an SSH session the connecting IP address will now be automatically added to csf.allow (note: it is not added to csf.ignore so lfd may still block it). This IP can be removed after testing if desired
• Modified the lfd.log format to the standard: :: lfd[]: If you parse lfd.log you will need to update your scripts!
• Added DEBUG option – for internal use only