patch to support hurd-i386

[Niels Provos]

In message <20001227234758.N12722 at seteuid.getuid.de>, Christian Kurz writes:
> * Hurd has no MAXHOSTNAME. Two instances replaced by fixed limit, where
> only the first N bytes were used, anyway. Two more instances replaced
> by a grow-until-fits loop.
A better fix would be to just define MAXHOSTNAMELEN.  Why make things
more complicated than they need to be.

Niels.