square/okhttp — pull request #277 by swankjesse (2013-08-11 14:19:23+00:00)
Title: Support multiple variants of the SPDY protocol.

This behavior-free refactoring makes the first baby steps towards
supporting HTTP/2.0. It adds indirection on the framing layer so
we can frame either using SPDY/3's syntax or HTTP/2.0's.