/etc/protocols seemed so empty (and I realized a few protocols that 
are actually used are missing), so I created a patch to add a _lot_ 
of new data in.

This has been adapted from FreeBSD with the following guideline:

I don't change existing protocol names and numbers unless 
they're plain _wrong_ (idpr-cmtp, rspf) so I wouldn't break anything.

If this is useful, I could perhaps do the same for /etc/services.  
That would be a bigger job though.