trunk-tracking: update from r3770 to r3784

* r3772 changed the format of unauthorized resource inlining config
* r3776 changed query param handling, but due to Jud's nice work in
  #616 needed no changes.
* r3780 huibao's refactoring lets us remove some duplicate code
* r3783 changes header passing with ipro
* Also cleaned up error messages for unknown options.
Merge pull request #622 from pagespeed/jefftk-trunk-tracking

trunk-tracking: update from r3770 to r3784