several tweaks and improvements, no real functional change
From Giovanni Bechis bigionews(at)snb(dot)it and
Mikaloj Kucharski mikalaj(at)kucharski(dot)name
o use SUBST_CMD
o fix README.OpenBSD
o fix path
o do not hardcode /usr/local
o add @bin markers
From Alexander Hall alexander(at)beard(dot)se
o add non root fd passing sudo instructions
bump PKGNAME
a1934c0929