Looking at the http method, it seems like it would be pretty easy to enqueue new (HTTP) URIs for redirects in http.cc. That "solution" is definitely a hack (it messes up concurrent downloads?), and what we really need, I think, is a new message we can pass back to apt:
30x URI Redirection Then, apt can re-issue a 600 to the appropriate method. Is this being worked on? I need it for a project I'm doing... -itai
