Code Review: finishremovesigning-1

This finishes off a bunch of work that removes the need to delay-sign
anything for local builds done by folks using the external layout (ie
SVN). No skip verification is required, and everything now works without
the need to define the SIGNED symbol.

tfpt review “/shelveset:finishremovesigning-1;REDMOND\jflam”
Comment :
Last odds and ends to remove signing from external builds.