JEP 102 Process Updates revised API draft

[Roger Riggs]

Hi,

After a protracted absence from working on JEP 102, the updated API draft
provides access to process hierarchies and individual process information;
as permitted by the OS. The relationship between Process and ProcessHandle
is clarified and the security model validated.

Both Processes and ProcessHandles can be monitored using CompletableFuture
for termination and to trigger additional actions on Process exit.
Information about processes includes the total cputime, starttime, user,
executable, and arguments.

Please review and comment:
    http://cr.openjdk.java.net/~rriggs/ph-apidraft/

Thanks, Roger