Issue #232; #235

@crankycoder r? 

Yes, it's sort of a daily thing. I'll try to stop, but, I may need professional help at this point.

What? I meant the code. 

The other thing is way beyond help.
The cause of the failure is generally printed out by a pre-existing error message (not captured in this PR, but viewable in 
https://github.com/mozilla-services/FindMyDevice/blob/dev/wmf/handlers.go#L997 ). wmf.NewHandler returning nil for any reason is itself a fatal error.