These changes ensure the caller can block until the
Application object can be fully prepared (especially
listening sockets). Solves the problem where tests
can attempt connections before the server sockets are
ready.
* WebSocket blocks until listening
* Application setup blocks until prepared and started
This is designed for use by proxies in front of rippled. Configured IPs
can forward identifying user data in HTTP headers, including
user name and origin IP. If the user name exists, then resource limits
are lifted for that session. However, administrative commands are still
reserved only for administrative sessions.
