RFC: Netx - Fix service exceptions thrown by the proxy

[Omair Majid]

Hi,

Netx uses dynamic proxies to wrap all calls to the various JNLP services 
and run them in privileged mode. If any method called throws an 
exception, it is wrapped in a InvocationTargetException. And then in a 
PrivilegedActionException. Now a client JNLP program doesnt know (and 
shouldnt know!) that we are using proxies. So it gets a totally 
unexpected exception and cant deal with the situation properly. [1] 
describes the bug in much more detail.

The attached patch fixes the problem by throwing the exception that 
caused the problem.

ChangeLog:
2009-10-15  Omair Majid  <omajid at redhat.com>

    * rt/net/sourceforge/jnlp/services/ServiceUtil.java:
    (invoke): Throw the exception that caused the problem.


[1] 
http://benpryor.com/blog/2006/08/15/java-dynamic-proxies-and-invocationtargetexception/
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