runshell/runjava lifecycle

One thing I am looking at is the RunShell component, that RunJava is 
based on. This has a couple of interesting features

1. it has its own attributes, "shouldDetach" "shouldTerminate", and 
"terminateOnFailure".  We could also support the new 'standard' 
sfShouldDetach,  sfShouldTerminate  and sfShouldTerminateQuietly options

2. it starts the thread under sfDeploy() and not sfStart(). Surely this 
is wrong? It should do its work under sfStart()? in sfStart(), runshell 
starts running the commands on the command list, but if you are using 
the component just to execute a native or java program with no commands, 
the execution should be delayed until sfStart(), as that is when you 
know everything else is set up right.

We could fix #2 without breaking things by having a flag saying when to 
start the worker thread.


for now, I'm leaving it alone but filing a bugrep.

-steve

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