- Match the HTTPbis recommendation for HTTP 301 redirects.
- Prevent hanging when using streaming uploads and Digest Auth when a 401 is received.
- Values of headers set by Requests are now always the native string type.
+- Fix previously broken SNI support.
+- Fix accessing HTTP proxies using proxy authentication.
- Parse headers correctly when users override the default ``Host:`` header.
- Avoid munging the URL in case of case-sensitive servers.
- Looser URL handling for non-HTTP/HTTPS urls.