diff from prx (prx [at] si3t [dot] ch) with a minor tweak by me: retain
the do-build since the port' makefile uses -Os and it's easier than
patch it out.
iblock is an inetd program adding the client IP to a Packet Filter
table. It is meant to be listening on a port with inetd and receive
connections with PF redirecting connections from a list of ports
you want to block.
port from prx (prx at si3t dot ch), ok solene@