send routing messages via routing sucket -- works better than via inet sucket

Fix pointer assignment in previous commit (test compile works better
when you do it with the #defines which actually compile the code
in question).

Use a bit more than 1 byte of space for routing messages.

fix typo in, um, copyright.

spotted by a keen-eyed enthusiast ;)

Add an example for a rump router cluster setup along with a README.

some contributions to the code from Martti Kuparinen