Verify any authorization information. Only basic authorization is currently defined in the HTTP/1.0 specification.
Check for an Authorization header in rq->headers that contains the authorization type and uu-encoded user and password information. If a header was not sent, return REQ_NOACTION.
If a header exists, check the authenticity of user and password.
If the user name and password are authentic, create an auth-type, plus auth-user or auth-group parameter in rq->vars to be used later by PathCheck SAFs.
Return REQ_PROCEED if the user was successfully authenticated Return REQ_NOACTION otherwise.