Rework of nrelease

[joerg at britannica.bec.de]

On Fri, Dec 09, 2005 at 12:32:32PM -0800, Matthew Dillon wrote:
>     You can either echo-out the appropriate command that the user
>     need to run, or you can provide a make target that gets the required
>     material.   This includes the installation of /etc/mk.conf. 

Two things are necessary: a working pkg_add and the results of make
fetch. The latter is the same as in the old routine, the former at least
very similiar. I'd document that requirement in UPDATING, other places
don't really make sense. For make fetch, rsync is also needed.

Joerg