add "jetty.http.host" property

[HeinrichAD]

Currently, the server connector uses 0.0.0.0 as fallback and always binds to all interfaces.

Add the possibility to set the network interface the Jetty server connector binds to as an IP address or a hostname. If null or 0.0.0.0, then its automatically binds to all interfaces.

These changes are based on a feature request and closes #161.

References:

• https://eclipse.dev/jetty/javadoc/jetty-11/org/eclipse/jetty/server/AbstractNetworkConnector.html#getHost()