am 2b3b26f5: am 32afccc7: Revert "Default host module tag to optional."

Merge commit '2b3b26f5b13e1b21b66e846a87b844309782d089'

* commit '2b3b26f5b13e1b21b66e846a87b844309782d089':
  Revert "Default host module tag to optional."