Configuration update

[Serge Aleynikov]

I think my prior submission attempt didn't get posted during list 
unavailability, so here it is again:

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Is there a way to refresh the node/application's configuration by 
rereading the content of the sys.config (or application-specific config 
provided on command line, such as: "erl -config "file...") file without 
restarting the node?

Since the content of the config file becomes a part of the application's 
environment at node startup, I want to ensure that I can change the 
configuration (by making changes in the config file using text editor), 
and force the application to refresh its environment with the new 
changes from file.  Merely trying to restart an application on a running 
node doesn't reread the config file's content.

What's the OTP-way to address this problem?

Regards,

Serge

P.S.
I found an undocumented application_controller:change_application_data/2 
function.  Am I looking in the right direction?