Add smokeping 1.5, latency logging and graphing system.
This port is heavily modified by kuriyama:
o Use BSD'ish directory hierarchy (imcomplete)
TODO for this port (will be done by kuriyama)
o Upgrade to 1.6 (see follow-up of this PR)
o Use non-privileged UID for smokeping
o Move *.pm to $PREFIX/lib/perl5/site_perl
Submitted by: Lars Thegler <email@example.com>