* Remove spurious debug output that was never enabled and make
  actual error messages the default behaviour.

* Update links and remove a bit of softcoding that was going
  on around the GUI through global variables (we don't want to
  hide the help menu, nope).

We have moved on to other means of firmware upgrades.  Gives us
the opportunity to do a little spring clean here.  (Plus I don't
have to fix the gzsig port anymore.)

While there, embed rc.embedded and fix permissions of rc.halt.