Port changes: * Set USE_GCC to allow build on FreeBSD 4.x * Add WITHOUT_LIBNET knob * Remove CC fixes, upstream makefile honours CC now * Upgrade to 0.0.4 Upstream changes: * Support for dropping privileges to unprivileged user * Portability fixes * Bug fixes RP: ports/90722 Submitted by: Daniel Roethlisberger <daniel@roe.ch>