Fix references to long obsoleted functions/aliases

Fix references to long obsoleted functions/aliases

* doc/lispintro/emacs-list-intro.texi (Miscellaneous):
* doc/misc/cl.texi (Conditionals):
* doc/misc/speedbar.texi (Major Display Modes): Use string-to-number,
not string-to-int.
* lisp/emulation/viper.el (viper-go-away): Use major-mode, not
default-major-mode.
* lisp/textmodes/reftex-toc.el (reftex-toc-visit-location): show-window
here is not a function call, but shorten the binding names anyways.
Also, use pop-to-buffer-same-window instead of switch-to-buffer cf
Bug#22244.
* lisp/textmodes/sgml-mode.el (html-tag-alist): Use read-string, not
read-input.