SPDY: remove SPDY/2 support
Bump the version number to 3.8.0.Final
Warn if boss/worker threads are not up within 10 seconds

.. because it is very likely to be a user mistake.

- Fixes #1304
Fix a bug where the warning message is logged in wrong occasion.
Fix a dead lock which occurs when multiple threads attempt to close the same SSL connection

- Fixes #1817
SPDY: code cleanup
Better fix for #1817 - do not close immediately on concurrent closeOutboundAndChannel()
Merge pull request #1927 from jpinner/spdy_cleanup

SPDY: code cleanup
avoid holding onto temporary buffers in SpdyFrameCodec

Conflicts:
	src/main/java/org/jboss/netty/handler/codec/spdy/SpdyHeaderBlockRawDecoder.java
	src/main/java/org/jboss/netty/handler/codec/spdy/SpdyHeaderBlockZlibDecoder.java
Merge branch '3' into netty3spdybuf

Conflicts:
	src/main/java/org/jboss/netty/handler/codec/spdy/SpdyHeaderBlockZlibDecoder.java
Merge pull request #1929 from wgallagher/netty3spdybuf

avoid holding onto temporary buffers in SpdyFrameCodec
Backport HttpHeaders / SpdyHeaders from Netty 4.
Add missing @Deprecated annotations
More robust pipeline manipulation while upgrading to WebSocket

- This commit allows a user to write its first web socket frame right after calling WebSocketServerHandshaker.handshake() rather than adding a listener to the future it returns.
- Should fix #1933