Running on bare metal, 127.0.0.1 is a sensible choice of address
to bind on, but that is not the case when running inside a
container, so we add the ability to choose which IP to listen on.
This can be given via the environment variable HTTP_HOST when
starting the server or, if used as a module, as the second
argument of the start(port, host, path) function.
Not sure if this is going to do anything in
terms of improving the handling of and reacting
to events, but it doesn't seem to hurt terribly.
Eventually, all this will probably need to be
refactored to use EventEmitter.
If the nav header is being received, this will
try to detect the start and end of line and create
an entry in the log.
It doesn't check whether FSP/FGSP LSP/LGSP entries
already do exist for that sequence.
Closes # 28.
