Use jailnet IP for event-server on FreeBSD as well as Linux.
Use jailnet IP for event-server on FreeBSD as well as Linux.

Also clean up some code that caused spurrious error messages in the log.

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