[Phoenix] Neutron-Auth does not specify WWW-Authenticate header

[Andreas Wuest]

Hi

Neutron-Auth does not specify a value for the WWW-Authenticate header. 
This makes it impossible to distinguish between used authentication 
schemes on the application layer, because we have to inspect the actual 
payload of the HTTP response to detect that we have a Neutron-Auth 
challenge.

I would therefore propose the following:

WWW-Authenticate: Neutron-Auth

This enables protocol handlers on the application layer to locate the 
correct authentication module to use.

-- 
Kind regards,
Andi