like the rest of the ports tree. This also allows removing a bunch of
manual setting of PATH="${PORTPATH}" HOME="${PORTHOME}" done in various
ports etc. This also makes sure CFLAGS is passed through (not everything
honours it but it does improve at least some ports).
Remove NO_CCACHE from www/honk that was added because the above problem
resulted in ccache variables not being passed through correctly breaking
the cc calls in this.
ok kmos@
