Log Message:
initial import of flc.

The Filter Language Compiler (flc) generates rules for the various
packages which perform packet filtering from a common language.

flc supports:
    IP Filter (full support - 2.8.1) 
    ipfw (Linux - 1.3.6Beta3) 
    ipfwadm (Linux - 1.2) 
    ipfirewall (Linux/*BSD - 2.0e) 
    Cisco (extended access-lists) 
    screend