Improve debugging output for HTTP2Handler. (#197)
Improve debugging output for HTTP2Handler. (#197)

Motivation:

Sometimes it's useful to be able to print out objects and see their
internal state. Somehow, HTTP2Handler can't do this.

Modifications:

Add a conformance to HTTP2Handler.

Result:

Awesome debugging output.
apple/swift-nio-http2,apple/swift-nio-http2,apple/swift-nio-http2,apple/swift-nio-http2