A heads-up that starting in r9321 the configuration variable hypergrid
moved from the command line to OpenSim.ini -- see OpenSim.ini.example.
This is the first of more changes ahead for configuring how to deal with
the various aspects of the HyperGrid -- hyperlinks, foreign visitors,
security, etc. Soon the single variable hypergrid will be replaced by 3
or 4 configuration variables that can be assigned values independently.