Hi all:

Does this sound like a reasonable idea?

Modify the http_auth variable to support:

  yes - use REMOTE_USER, HTTP_AUTHORIZATION (as current)
  no - disable (as current)
  HTTP_*  - look for the HTTP_* variable in the env array
            and use the value of that variable like REMOTE_USER.
	    E.G. the value HTTP_PROXY-USER or http_proxy-USER
	    looks for env['HTTP_PROXY-USER']
  
We pair that with a new config variable

  pass_headers = proxy-user, X-Free-Registration

which generates entries:

   env[HTTP_PROXY_USER], env[HTTP_X_FREE_REGISTRATION]

if the corresponding headers exist.

So for Anthony to get what he wanted (assuming the header uid_variable
contains the username) the config:

  http_auth = HTTP_UID_VARIABLE
  pass_headers = uid-variable

Would your use case be handled by this proposal Anthony?

Thoughts?