Update README contrib

[Russ Allbery]

Julien ÉLIE <julien at trigofacile.com> writes:

> I have just checked out INN repository and tried to update
> the README file of « contrib » but as I suspected, I couldn't.

> So if someone thinks the changes I made (remove ninpaths which
> is in backends, add the description of some missing scripts and
> correct some missing « s ») are relevant, can he commit them?

> http://people.via.ecp.fr/~iulius/inn2/README.2.4-contrib
> http://people.via.ecp.fr/~iulius/inn2/README.trunk-contrib

Thanks, applied.  (I'm sorry about how long it's taken me to get to these.
I hope it won't discourage you from contributing in the future!)

-- 
Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>