Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Second round:

1. Make paths work correctly.
2. Make pkg_add generally more robust in the face of failure.
3. Make the depend messages come out on stderr or stdout, but not both
interspersed! :-)

Many of John T. Kohl's patches from NetBSD. Thanks, John!
Submitted by: jkohl

Finally stuck a version number on this thing! :)

Rudementary README