Socket may become not `readable`, but http should not rely on this
property and should not think that it means that no data will ever
arrive from it. In fact, it may arrive in a next tick and, since
`this.push(null)` was already called, it will result in a error like
this:

    Error: stream.push() after EOF
        at readableAddChunk (_stream_readable.js:143:15)
        at IncomingMessage.Readable.push (_stream_readable.js:123:10)
        at HTTPParser.parserOnBody (_http_common.js:132:22)
        at Socket.socketOnData (_http_client.js:277:20)
        at Socket.EventEmitter.emit (events.js:101:17)
        at Socket.Readable.read (_stream_readable.js:367:10)
        at Socket.socketCloseListener (_http_client.js:196:10)
        at Socket.EventEmitter.emit (events.js:123:20)
        at TCP.close (net.js:479:12)

fix #6784

fix #6933

Original commit message:

    ares_parse_txt_reply: return a ares_txt_reply node for each sub-string

    Previously, the function would wrongly return all substrings merged into
    one.

fix #6931

fix #6908

fix #6945

fix #6963

So that we are free to call socket.destroy() in error event handler.

fix #6769

Conflicts:
	src/node_crypto.cc
	test/simple/test-crypto.js

node -p would cause an access violation.

Fixes test\message\stdin_messages.js on Windows.

The test was not waiting for all the worker-created sockets
to be listening before calling cluster.disconnect().
As a result, the channels with the workers could get closed
before all the socket handles had been passed to them, leading
to various errors.

Right now no default ciphers are use in, e.g. https.get, meaning that
weak export ciphers like TLS_RSA_EXPORT_WITH_DES40_CBC_SHA are
accepted.

To reproduce:

node -e "require('https').get({hostname: 'www.howsmyssl.com', \
  path: '/a/check'}, function(res) {res.on('data', \
  function(d) {process.stdout.write(d)})})"

Built-in modules should be automatically registered, replacing the
static module list.  Add-on modules should also be automatically
registered via DSO constructors.  This improves flexibility in adding
built-in modules and is also a prerequisite to pure-C addon modules.

In the case of a pipe'd input, i.e. from the CI the fd will be a PIPE
and when listen() is called it will return ENOTSOCK instead of EINVAL.

It's saner to check exit codes or signals to determine if the process
actually aborted. On OSX and Linux the exit code is 134, on SunOS it
propagates the SIGABRT signal

fix #6724

Fix build break.