Thanks, John, for the quick reply.
So my idea of fixing this looks right.

On Wed, Jun 19, 2019 at 09:46:45PM +0000, John Rouillard wrote:
> Are you planning on doing something like:
> 
> class HttpHeaders:
[...]

Yes, similar. I've not copied the dict but pass the environ into
the constructor and mangle incoming names on lookup.

I'm not entirely sure if we only need to support get / getheader
or if all the other dictionary methods should also be supported.
At least rest.py only uses get.

I've just pushed the change, it now works for me.

Ralf
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