only check for an hg map server if in opensim, also guard against a potential crash
only check for an hg map server if in opensim, also guard against a potential crash

gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm