This is the pkg_install suite of tools for doing maintainance of
software "packages".  More documentation is available in the man pages
for each individual command.

The original utilities were written by Jordan Hubbard for FreeBSD, snatched
and mildly reshaped by John Kohl in NetBSD and the changes taken back into
FreeBSD again by Jordan, who then proceeded to add another couple of dozen
features on top, along with enhancements from NetBSD and OpenBSD.

This is a complete rewrite of the tools, to have a similar functional
interface, but with a completely different model for working internally. 
Along with cleaning up the functioning of the code considerably, these
changes also enable several new features, and provide a C API for the
package library, so that third party applications can participate in package
management.

XXX: (reg) Explain design.
