I noticed a couple of checkdoc.el variables which could have
safe-local-variable settings.  I struck checkdoc-arguments-in-order-flag
and checkdoc-symbol-words in bongo.el.

The checkdoc-symbol-words docstring invites you to set it as a local
variable, so it in particular ought to have something for what's safe.

2009-07-30  Kevin Ryde  <user42@zip.com.au>

	* emacs-lisp/checkdoc.el (checkdoc-force-history-flag,
	checkdoc-arguments-in-order-flag): Add safe-local-variable booleanp.
	(checkdoc-symbol-words): Add safe-local-variable for list of strings,
	clarify docstring that the value is strings not symbols.