Add support for custom JMXConnectors in JConsole through a system property "jconsole.jmxConnectorBuilder" that takes a user-defined class that implements
a well-defined interface and returns a fully configured JMXConnector ready to
use.

The interface might look like:

public interface JMXConnectorBuilder {
    public JMXConnector getJMXConnector(JMXServiceURL url,
                                        String username,
                                        String password);
}

Adding this to JConsole would allow customers to configure SSL factories and
authentication in a more flexible way for the out-of-the-box management and
also to support protocols other than "rmi".

This new RFE will complement the already existing one:

6229985: Allow to supply properties in the Advance tab.
We could reuse javax.management.remote.JMXConnectorProvider for this, with its single method:
    JMXConnector newJMXConnector(JMXServiceURL url, Map<String,?> env)
        throws IOException;
The Map would optionally contain username and password encoded in the usual way inside the jmx.remote.credentials value.