Commit pkg_radd(1) on behalf of corecode@. pkg_radd is a wrapper for

Commit pkg_radd(1) on behalf of corecode@.  pkg_radd is a wrapper for
pkg_add(1) to install binary packages.  This allows users to install binary
packages out-of-the-box without fetching the pkgsrc(7) tree or without
looking at any site hosting binary packages.

  # pkg_radd -v host
  [...]
  extract: Package name is host-20040812
  extract: CWD to /usr/pkg
  [...]
  Attempting to record package into /var/db/pkg/host-20040812.
  Package host-20040812 registered in /var/db/pkg/host-20040812

The mentioned /etc/settings.conf will follow in a later commit.  pkg_radd
will work fine without that file.

Submitted-by: corecode@
mdoc-ok-by: swildner@