add "check" and "installcheck" targets, straighten out make variable naming
of host_os, host_cpu, etc.

Read templates after compiler is detected. Convert all templates to real
shell scripts. Rename bsd->openbsd, alpha->osf.

Clean up the .sample files...comment out all sample entries except for
the localhost one

	Further extended Makefile.global/build/configure so that we can
have a 'template' file for each OS (and each version of OS, as in BSDi)
which is used as much as possible to generate Makefile.global

	Any future ports should look at using the template file as a basis,
before moving over to Makefile.global.

	This will most probably break alot of the ports, atho I've tried to
be very neat about it...