Replaced deprecated 'sendUnsupportedWebSocketVersionResponse()' with 'sendUnsupportedVersionResponse()'
Fix a problem where DefaultChannelId prevents Netty 5 from running on Android

- Fixes #2109
- Use reflection to find the current PID
Correct JavaDoc
Get the PID properly on Android

- Related: #2109
Fix a bug where SpdyHeaderBlockZlibDecoder fails to decompress

- Forward-port 4c35b593c1ec811d1134cb0ef43db9329935e18e, originally written by @wgallagher
- Fixes #2077
Port the changes in SpdyHeaderBlockZlibEncoder to master & 4.0

Somehow it slipped away.
Port the changes in SpdyHeaderBlockRawDecoder to master & 4.0

Somehow it slipped away.
Fix a bug where DefaultChannelPipelineTest.testFireChannelRegistered() triggers channelRegistered() twice
Add missing validation which results in NPE later
Better exception message
Fix checkstyle
Use the source frame's allocator instead of the unpooled allocator
microbench: move from Caliper to JMH
Add HttpChunkedInput for easier streaming of chunked content
Add a link to the wiki page about the microbench module
Fix inspector warnings
Make JMH options modifiable through the subclassed benchmark.
Using SystemPropertyUtil for prperty parsing.
Update README.md
Fix the 'branches to look' section