Doc fixes for obsolete functions and variables

Doc fixes for obsolete functions and variables

* admin/notes/multi-tty:
* doc/emacs/building.texi (Debugger Operation):
* doc/misc/efaq-w32.texi (Line ends by file system):
* doc/misc/gnus.texi (Hashcash):
* lisp/emacs-lisp/eieio.el (eieio-class-parents)
(eieio-class-children):
* lisp/progmodes/perl-mode.el:
* lisp/textmodes/ispell.el (ispell-lookup-words):
* src/buffer.h: Update or delete references to variables and functions
made obsolete in Emacs 24.4.