For OpenBSD 5.7 includes and unused variables

5.7p1

Merge branch 'master' of github.com:echothrust/pf-diverters

OpenBSD 5.7 based release with clean Makefiles and style(9)

OpenBSD 5.7 based release with clean Makefiles. This is no feature release. It has minor changes in order to help into incorporating pf-diverters into the OpenBSD ports system.