Improved login error checking, including changing XML server login errors to hard die errors, rather than soft errors that would fail silently.  Added example for retrieving session information to the synopsis.
Improved login error checking, including changing XML server login errors to hard die errors, rather than soft errors that would fail silently.  Added example for retrieving session information to the synopsis.

bradmc/Ham-Reference-Callook,bradmc/Ham-Reference-QRZ