net: Refactor to use streams2

This is a combination of 6 commits. * XXX net fixup lcase stream * net: Refactor to use streams2 Use 'socket.resume()' in many tests to trigger old-mode behavior. * net: Call destroy() if shutdown() is not provided This is important for TTY wrap streams * net: Call .end() in socket.destroySoon if necessary This makes the http 1.0 keepAlive test pass, also. * net wtf-ish stuff kinda busted * net fixup

Author: isaacs