getCause() and initCause() need to be modified to track the same "cause"
as getRootCause() and setRootCause().  Also, printStackTrace() needs to be modified so that invocations behave consistently with other exceptions in 
the JDK that have nested exceptions.

N/A

  xxxxx@xxxxx   2002-01-22

Use Throwable.getCause() to implement NamingException.getRootCause().



  xxxxx@xxxxx   2002-04-23

Actually, use NamingException.getRootCause() to implement Throwable.getCause(),
and NamingException.setRootCause() to implement Throwable.initCause().



  xxxxx@xxxxx   2002-07-22

In addition to the above, delete the overrides for printStackTrace().
Throwable.printStackTrace() has done the right thing since 1.4, so there's
no longer a reason to bypass it.