Prefer defcustom :safe to putting 'safe-local-variable'

Prefer defcustom :safe to putting 'safe-local-variable'

* lisp/emacs-lisp/lisp-mode.el (lisp-indent-offset)
(lisp-body-indent, emacs-lisp-docstring-fill-column):
* lisp/files.el (version-control):
* lisp/progmodes/modula2.el (m2-indent):
* lisp/progmodes/octave.el (octave-block-offset):
* lisp/progmodes/sh-script.el (sh-basic-offset):
* lisp/progmodes/tcl.el (tcl-indent-level)
(tcl-continued-indent-level):
* lisp/simple.el (fill-prefix):
* lisp/textmodes/fill.el (colon-double-space):
* lisp/textmodes/paragraphs.el (paragraph-start)
(paragraph-separate, sentence-end-double-space)
(sentence-end-without-period, sentence-end-without-space)
(sentence-end, sentence-end-base, page-delimiter)
(paragraph-ignore-fill-prefix):
* lisp/textmodes/tex-mode.el (tex-fontify-script):
* lisp/vc/add-log.el (add-log-dont-create-changelog-file):
* lisp/vc/vc-hooks.el (vc-follow-symlinks): Prefer defcustom :safe to
putting 'safe-local-variable'.