Fix MiscUtils: closeSilently should check for nullity
Upgrade Netty 3.9.3
Merge pull request #662 from pdalpra/fix-MiscUtils

Fix MiscUtils: closeSilently should check for nullity
Merge pull request #663 from pdalpra/upgrade-netty-3.9.3

Upgrade Netty 3.9.3
0 content-length means empty file, not chunked
Don't use replace but addAfter+remove so that first frame is not lost, close #471
minor clean up
append char instead of String
Target JDK7, use getHostString instead of getHostName, close #672
Wrong javadoc, close #666
Add handler callbacks, close #673
Handle Continuation frames, close #674
Introduce a config parameter for websocket max frame size, close #675
future can be null, directly pass the handler
[maven-release-plugin] prepare release async-http-client-1.9.0-BETA7
[maven-release-plugin] prepare for next development iteration
IdleChannelDetector should remove empty queues, close #676
Add UriComponents.toRelativeUrl, close #677
[maven-release-plugin] prepare release async-http-client-1.9.0-BETA8
[maven-release-plugin] prepare for next development iteration