NEW: security/fwknop

Hi,

in the need of a client for "fwknop" (the "FireWall KNock OPerator") I
packaged the official client (http://www.cipherdyne.org/fwknop/). As
there is a server daemon in the sources as well, I included it too.

$ cat pkg/DESCR
fwknop stands for the "FireWall KNock OPerator", and implements an
authorization scheme called Single Packet Authorization (SPA). This method of
authorization is based around a default-drop packet filter and libpcap. SPA is
essentially next generation port knocking.

IMHO the port is in good condition; the only drawback is "USE_LIBTOOL = gnu".
I was not able to get rid of it.

OK to import?

Best regards,
Ingo