Fix a few nits (spelling errors, etc.)
Fix a few nits (spelling errors, etc.)

Remove reference to cvsup, since we're moving away from it.

Remove reference to dhcpd, since a better explanation is now in
setup-nodes.txt .

Fix up text about named.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome