Make dhcpd_makeconf restart subboss dhcp servers
Make dhcpd_makeconf restart subboss dhcp servers

When installing and/or restarting a new dhcpd.conf, make sure that
we run the subboss_dhcpd_makeconf script on subbosses as well.

I thought I pushed this before, but apparently I stashed it
and never applied it again.  Oops. :-(

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