It is useful in some cases to indicate that calls to a var should never be direct linked. That is possible with ^:dynamic but that has additional semantics (and cost). Add a new ^:redef meta for vars that prevents direct invocations but does not have the ^:dynamic semantics.
From CLJ-1845, load was marked dynamic for this reason, now change to redef instead.
Patch: clj-1851.patch (also changes load to be :redef rather than :dynamic)