Backspace doesn't work in filename search (C-s) in xterm

[Andrew V. Samoilov]

Also M-Backspace works now as simple Backspace in command line in xterm 
  instead of previous word deleting as before.

Well, these shortcuts were working in xterm before, and they work fine 
in the linux console now.

P.S. There is working delete_word_left in the built-in editor, but I 
cannot find how to define M-Backspace in editkeys.c.

-- 
Regards,
Andrew V. Samoilov