qa/admin/check-vm: initial changes for OpenBSD
qa/admin/check-vm: initial changes for OpenBSD

Lots of Perl stuff would appear to be only available from cpan,
otherwise pkg_add seems to be able to deliver most of the required
build and qa prereqs.

wuliming/pcp,wuliming/pcp,wuliming/pcp,wuliming/pcp,adfernandes/pcp,adfernandes/pcp,wuliming/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,wuliming/pcp,adfernandes/pcp,adfernandes/pcp,wuliming/pcp,wuliming/pcp,adfernandes/pcp