RequestHandler does callRedirect for uri "logout"

[Jonathon -- Improov]

When callRedirect() is called, the response is committed. That means LoginWorker fails when trying 
to create a new session.

I understand that we can do "<@ofbizUrl secure="true">logout</@ofbizUrl>". But that really looks 
like a workaround. Is it wrong to call "logout" in http, rather than in https? For efficiency, we 
often want only the login page in https, and the inside pages in http.

If you wanna fix this, it's in RequestHandler.java line 129.

Jonathon