Optional require-change-reason Processing

I can't seem to figure out how to implement optional 
require-change-reason processing. For example, we do not wish to force 
this processing for certain values of "Responsible". Ideally, I would 
like to implement something like:

    on-change "oldpr:Responsible !=\"unassigned\"" {
        require-change-reason
    }

 I've tried some simple tests like:

    on-change "Responsible ==\"edjaffe\"" {
        require-change-reason
    }

No matter what expression I code, GnatsWeb ignores the expression and 
forces the change reason to be entered. I've bypassed that code in 
gnatsweb.pl just to see how gnatsd will react to the PR edit with or 
without the reason. Gnatsd seems to update the PR without complaint no 
matter what the Responsible value. This leads me to think gnatsd doesn't 
care about change reasons and expects the apps themselves to do the 
enforcement. And I can't see how my on-change expression influences 
GnatsWeb to decide whether to require the field.

Is what I want to do possible? If so, what am I doing wrong? Any help 
appreciated...

-- 
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| Edward E. Jaffe                |                                |
| Mgr, Research & Development    | [email protected]    |
| Phoenix Software International | Tel: (310) 338-0400 x318       |
| 5200 W Century Blvd, Suite 800 | Fax: (310) 338-0801            |
| Los Angeles, CA 90045          | http://www.phoenixsoftware.com |
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