Log Message:
NetBSD compat packages. They chain each other so if you're on NetBSD-6.0
and want NetBSD-5.0 compatibility, compat50 will depend on compat51 to
bridge the gap. There is currently no need for a compat52, nor for a
compat60-x11.

The compat tarballs may be larger than strictly necessary.
Testing was 'lightly', so there's probably Room for Improvement (tm).