The great key rebinding (part 2).

The great key rebinding (part 2).

We assume that the X server is running with DontZap.  Still, to make
C-M-DEL actually do the right thing, we need to do two more hacks.

  * xinitrc: Remove the mapping of BackSpace to Terminate_Server.
    Because DontZap is set, this keysym does nothing at all, which is
    much less helpful than just being a modified backspace.

  * emacs: For some reason, ESC C-DEL is bound by default, but C-M-DEL
    isn't.  Provide the binding ourselves.