This commit contains these changes:
* Change example documentation to use markdown
* Generate HTML doc based on markdown during release
* Fix XML formatting in some examples
* Repair out-of-date documentation
Before this change, the example would fail with exception
javax.jms.JMSSecurityException: AMQ119032: User: null does not
have permission='BROWSE' on address jms.queue.exampleQueue
The old property-file based security manager shouldn't be used anymore. Instead
use the JAAS InVMLoginModule for in-vm tests, embedded use-cases, etc. and use
the other JAAS login modules for normal server use-cases.