* lisp/net/net-utils.el (net-utils-remove-ctrl-m-filter):
Use with-current-buffer and don't move point.
(net-utils-run-simple): Remove useless code.
(net-utils-remove-ctl-m): Remove unused custom.
* lisp/recentf.el (recentf-save-file): Use locate-user-emacs-file.
* notes/unicode: Improve notes about Emacs source file encoding.
* admin/notes/unicode: Fix "the these" typo.
Switch encodings of tutorials, thai-word to UTF-8.

* etc/refcards/ru-refcard.tex:
* etc/tutorials/TUTORIAL.bg, etc/tutorials/TUTORIAL.bg, etc/tutorials/TUTORIAL.cn:
* etc/tutorials/TUTORIAL.cs, etc/tutorials/TUTORIAL.de, etc/tutorials/TUTORIAL.eo:
* etc/tutorials/TUTORIAL.es, etc/tutorials/TUTORIAL.fr, etc/tutorials/TUTORIAL.it:
* etc/tutorials/TUTORIAL.nl, etc/tutorials/TUTORIAL.pl, etc/tutorials/TUTORIAL.pt_BR:
* etc/tutorials/TUTORIAL.ro, etc/tutorials/TUTORIAL.sk, etc/tutorials/TUTORIAL.sv:
* etc/tutorials/TUTORIAL.zh:
* lisp/language/thai-word.el:
Switch to UTF-8.
Use locate-user-emacs-file.
* lisp/type-break.el (type-break-file-name):
* lisp/textmodes/remember.el (remember-data-file):
* lisp/strokes.el (strokes-file):
* lisp/shadowfile.el (shadow-initialize):
* lisp/saveplace.el (save-place-file):
* lisp/ps-bdf.el (bdf-cache-file):
* lisp/progmodes/idlwave.el (idlwave-config-directory):
* lisp/net/quickurl.el (quickurl-url-file):
* lisp/international/kkc.el (kkc-init-file-name):
* lisp/ido.el (ido-save-directory-list-file):
* lisp/emulation/viper.el (viper-custom-file-name):
* lisp/emulation/vip.el (vip-startup-file):
* lisp/calendar/todo-mode.el (todo-file-do, todo-file-done, todo-file-top):
* lisp/calendar/timeclock.el (timeclock-file): Use locate-user-emacs-file.
Prefer UTF-8 in commentary.
Prefer UTF-8 in documentation.