(hack-local-variables-prop-line): Return a list of variable-value
pairs if MODE-ONLY is non-nil.
(hack-local-variables): Construct list of variable-value pairs,
and apply or reject them in one go. Ask for confirmation if
variables are not known safe.
(hack-local-variables-confirm): Complete rewrite. Support
`safe-local-variable-values'.
(enable-local-variables): Update docstring to reflect new
behavior.
(ignored-local-variables): Ignore ignored-local-variables and
safe-local-variable-values.
(safe-local-variable-p): New function.
(risky-local-variable-p): `safe-local-variable' property check
moved to safe-local-variable-p.
(hack-one-local-variable): Checks moved to hack-local-variables.
(byte-compile-dynamic, c-basic-offset, c-file-style,
c-indent-level, comment-column, fill-column, fill-prefix,
indent-tabs-mode, kept-new-versions, no-byte-compile,
no-update-autoloads, outline-regexp, page-delimiter,
paragraph-start, paragraph-separate, sentence-end,
sentence-end-double-space tab-width, version-control): Add
`safe-local-variable' property.
* find-lisp.el: Delete nonexistent `autocompile' file variable.
* icomplete.el, play/landmark.el: Change nonexistent
`outline-layout' file variable to `allout-layout'.
