Setting for omitting 'qop' field in Digest response

[GCSBOSS]

I'm using httpbin as to unit test my client application.

My use case requires me to test behavior when the server doesn't include qop field in it's WWW-Authenticate header (supported by RFC 7616 for retro compatibility). Any way we can have an option for that? Like /digest-auth/none/user/pass

Then probably changing this line:

https://github.com/postmanlabs/httpbin/blob/f8ec666b4d1b654e4ff6aedd356f510dcac09f83/httpbin/helpers.py#L471

Instead of defaulting to auth, auth-in, you should not send the field at all.

Thanks for your effort!