Getting our definitions of encryption straight for the HTTP/2 security discussion

Greetings again. Over the past weeks, people are sometimes talking past
each other when they say they want to "always encrypt" HTTP/2 traffic. In
specific, many people have used the term "opportunistic encryption" in very
different ways without knowing it.

To help people at least understand what each other might be saying in the
future, I created a page with some definitions that hopefully everyone can
use. Comments are welcome.

http://trac.tools.ietf.org/wg/httpbis/trac/wiki/encryption-definitons

--Paul Hoffman