37signals/pow — pull request #291 by sujal (2012-06-06 15:41:26+00:00)
Title: Followredirects 

This is necessary so that redirects from the destination server are
returned to the client as expected rather than getting swallowed by the
proxy code. Important for things like logins to the destination app.

(you just need the last commit - i can't remember if there's a way to tell git/github that the other commits should be ignore for the pull request, don't have time to look it up now)