Provide way to get non AnnotatedExceptions.

[Mystiflow]

AbstractChannel wraps various exceptions into an annotated version:

netty/transport/src/main/java/io/netty/channel/AbstractChannel.java

Line 1021 in aa8bdb5

protected final Throwable annotateConnectException(Throwable cause, SocketAddress remoteAddress) {

I am using a system to send this exception as a message inside a ChannelFutureListener to a client, but the annotated exception appends the remote address to the message. I do not want the client to see this remote address. I propose a way to retrieve the non annotated exception message in addition to the annotated exception.

Thanks.

[normanmaurer]

@Mystiflow why not just replace the message by yourself ? Alternative we could allow to disable it via a system property.

[Mystiflow]

I figured it was a hacky workaround and non future proof.