5.3 Rearrange request header order
5.4 SPDY
5.5 auth= in URLs
+ 5.6 Refuse "downgrade" redirects
6. TELNET
6.1 ditch stdin
Additionally this should be implemented for proxy base URLs as well.
+5.6 Refuse "downgrade" redirects
+
+ See https://github.com/bagder/curl/issues/226
+
+ Consider a way to tell curl to refuse to "downgrade" protocol with a redirect
+ and/or possibly a bit that refuses redirect to change protocol completely.
+
+
6. TELNET
6.1 ditch stdin