Allow tagged reload_daemons to be run as non root; also a temp fix.
Allow tagged reload_daemons to be run as non root; also a temp fix.

Also temporarily invoke os_load for reload_daemon with -R to force
reconfig -- should only be used by switches right now, so safe to globally
enable.

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