Revert "never set the certfp lookup key before verification"
Revert "never set the certfp lookup key before verification"

This reverts commit a120cc24436a69402f95644eb5e1ef92c04148b2.

oragono/oragono,oragono/oragono,DanielOaks/oragono,DanielOaks/oragono,oragono/oragono