2c13f71c73
Motivation: 952eeb8e1e3706b09d4d3f32f16d7f0e5c540cb5 introduced the possibility to use any JDK SocketOption when using the NIO transport but broke the possibility to use netty with java6. Modifications: Do not use java7 types in method signatures of the static methods in NioChannelOption to prevent class-loader issues on java6. Result: Fixes https://github.com/netty/netty/issues/8166.