Fixes #1894.

Add 'secureConnect' event to tls.CleartextStream.

Fixes #1467.

This commit fixes two bugs in the handling of write requests when the connect()
call is still in progress.

1. The deferred write request's size was counted twice towards `.bytesWritten`.

2. The callback was not called. After connecting, `Socket.write()` was called
   with three arguments (data, encoding, cb) but it ignored the third argument.

Coincidentally fixes test/simple/test-net-connect-buffer.js.

Output from `ps` may contain trailing whitespace, trim it.

Unbreaks build on SunOS. Un-reverts 9bbca991.

Fixes #1516.

Fixes #1888.

A class with virtual methods should have a virtual destructor.

Only register once for listening when passing a callback to Server.listen(),
this prevents servers recycled using close() from invoking the callback when
Server.listen() is called later.

On platforms that support it: linux, freebsd, darwin

Fixes #1644

Reading of JSON data off the buffer, 10-15% performance increase.

Fixes #1864.