Fix URLs to configurable subdir.
Fix URLs to configurable subdir.

SamPenrose/fhr-toolbox,mozilla-metrics/fhr-toolbox,SamPenrose/fhr-toolbox,SamPenrose/fhr-toolbox,mozilla-metrics/fhr-toolbox,SamPenrose/fhr-toolbox,mozilla-metrics/fhr-toolbox,SamPenrose/fhr-toolbox,mozilla-metrics/fhr-toolbox,mozilla-metrics/fhr-toolbox