YpBind stuff

The Slackware ypbind is the GPL'ed one. The Debian ypbind is one that
I hacked up based on the BSD ypbind, because the GPL'ed one wasn't
stable in a multiple-NIS server environment. The current debian ypbind is,
in fact it's rock stable.

The thing is that with the GPL'ed ypbind you could bind it to a NIS
server manually through /etc/yp.conf. The BSD one relies on broadcasts,
the -S option is only to restrict to which server it eventually binds.