[#1832] - Channel writability change notifications sometimes fail to fire
[#1874] WebSocket08FrameDecoder may leak memory if channel is closed before the full frame was received
[#1878] Fix leak of ByteBuf when masked payload is used
[#1879] Correctly validate close frame
[#1880] Use ByteBufAllocator when read bytes into new chunks
[#1876] Make use of proper state machine in WebSocket08FrameDecoder for performance reasons
Merge remote-tracking branch: upstream/master