Fix anchoring
!1054 (merged) did not catch all cases where the principal of a directory anchor needed to be rewritten and as a consequence. Revert !1054 (merged) and instead change how anchor signatures are validated.
!1054 (merged) did not catch all cases where the principal of a directory anchor needed to be rewritten and as a consequence. Revert !1054 (merged) and instead change how anchor signatures are validated.