6450848: make it easier to get the ObjectName of a JMX Proxy Summary: Rework proxy javadoc to explain how to do this. Reviewed-by: sjiang

6252609: Two different default descriptor forms defined for ModelMBeanInfoSupport 6253137: Documentation for NotificationListener's handback parameter is confusing 6368691: javadoc for JMX Descriptors has bugs and is very hard to navigate. 6602699: support for async notification of mbeaninfo update 6759612: [javadoc] EventClient.NOTIFS_LOST has a garbled href to addEventClientListener 6759619: Clarify what EventClient.getEventClientNotificationInfo does 6759622: Clarify what EventClient.getListeners list does Summary: Documentation fixes, plus simple bugfix for 6759619. Reviewed-by: dfuchs