Add EventFork() to event.pm (perl interface to event system) and to
the tail file of course. Called from TBdbfork() in libdb, EventFork resets the event handle so that the child does a reconnect. Note that I do not disconnect in the child since I have no idea what that is going to do to the parents connection to the elvind, as Elvin makes no mention of what to do in the presence of a process that forks after connecting to the event server. At the least, this avoids a bunch of warnings and errors from vnodesetup!