PDP11: XQ Device is now bootable on a Qbus PDP11 simulator.  The ROM based Citizenship tests now pass.

Separate boot ROMs are available for each of the DEQNA, DELQA and DELQA-T devices being simulated.
DEQNA-Lock mode has been added to the DELQA and DELQA-T simulations.
SCP: Show device options can be more flexibly formatted and optionally not display anything.