Attached a patch to remove the build-time dependency of portsmf on the
Autoconf Macro Archive when building on *nix. The macros themselves are
straight copies of the ones in the macro archive at the moment.
Note that this won't apply cleanly to the current SVN version of portsmf
because when the configure system files were checked in there they were
given the wrong line endings, so the patch doesn't apply (for some
reason they have DOS line endings, despite being fundamentally Unix