Subject: malformed :safe entry in several defcustoms

From: Glenn Morris <[email-masked]>
Date: Fri, 01 Oct 2021 11:41:56 -0400

Package: emacs
Version: 28.0.60

Around 30 defcustoms (mostly in Org) state ":safe t", which is incorrect.
The safe-local-variable property should be a predicate function of one
argument.