}
//这里并没有把ServerBootstrap.setOption进来的socket参数赋给socket.socket()
//而是在fireChannelOpen(this)时在ServerBootstrap$Binder===>channelOpen(2)中setOptions时
//才调用DefaultServerChannelConfig.setOptions把socket参数赋给socket.socket()
config = new DefaultServerSocketChannelConfig(socket.socket());
//Channels类
fireChannelOpen(this);
}finally{//我加上的