Netty.docs: New and noteworthy in 4.0

Did you know this page is automatically generated from a Github Wiki page? You can improve it by yourself here! This document walks you through the list of notable changes and new features in the major Netty release to give you an idea to port your application to the new version. The package name of Netty has been changed from org.jboss.netty to io.netty since we are not part of JBoss.org anymore.

[todesking]

netty、interfaceをabstract classに変更したらスループットが5%上がったとか言ってて本気度が高い