AFNetworking/AFNetworking — pull request #1252 by getaaron (2013-08-25 02:37:29+00:00)
Title: Pass disposition instead of forcing NSURLSessionAuthChallengePerformDefaultHandling

This implementation (I believe unintentionally) forces `NSURLSessionAuthChallengePerformDefaultHandling` to be returned to the `completionHandler`. This will ignore any `NSURLCredential` that may be provided in in the `sessionDidReceiveAuthenticationChallenge` or `taskDidReceiveAuthenticationChallenge` blocks.