netty/netty — pull request #1786 by d-t-w (2013-08-27 06:25:07+00:00)
Title: noJdkZlibDecoder system variable is being negated.

This means:

1. The JdkZlibDecoder is being selected by default if you are using java 7; and,
2. -DnoJdkZlibDecoder=false will use the JZlibDecoder, expecting you to have that dependency on the classpath.