Add a sample ifconfig entry for an IPX address family address, to give IPX folks a fighting chance of figuring this out themselves.  I can't work out how to document this carefully in rc.conf(5), but this ought to close the PR.
Add a sample ifconfig entry for an IPX address family address, to give
IPX folks a fighting chance of figuring this out themselves.  I can't
work out how to document this carefully in rc.conf(5), but this ought
to close the PR.

PR:		17904
Reported by:	John Gelnaw <jeg@hawk.circa.ufl.edu>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase