Solved
Change AEM's redirection HTTP status code
I'd like to change the default redirection status code from 302 to 301. According to this, I can do it via OSGi configuration:
http://blogs.adobe.com/ contentmanagement/2013/08/20/ how-to-change-aems- redirection-http-status-code/
But I don't appear to have the option in the dialog (I'm on version 5.5.0) (see attached)