Password distribution stuff

Hi everyone,

I've checked in some bits and pieces for distributing passwd/shadow files
to a set of hosts, without using NIS.

It handles multiple platforms, and has immense amounts of paranoia about
the files to ensure they are correct. It distributes the files over ssh
(using rsync).

It seems to work, but I've only tested it on Solaris so far. I would not
recommend using it right now, but it's there if you want to take a gander.
AFAIK, it's pretty secure (a few things may need looking at), and seems
quite robust. I guess I'll find out soon enough though, when none of my
users can login tomorrow ;-)

Incidentally the sidai packages: passwd-dist.xml and
passwd-dist-config.xml are old style XML, hence they won't work with the
current engine. I will update these as soon as I get chance, and also
hopefully write some documentation...

Matt