Means that SOCKET is used as the socket type everywhere on Windows.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=462781

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=462780

Websockets clients are now periodically disconnected if they have not
maintained their keepalive timer.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=461619

Thanks to Mikkel Kirkgaard Nielsen.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=461705

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=463000

Thanks to Alexandre Zia.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=463241

Thanks to Aidan Gill.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=462154

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=461620