Append an option in Manager to be able to set RULES_URL param
Summary
Handler type can be specified by using Manager (Main, ServiceToken, DevOps,....). So, it implies ReverseProxy architecture. Else providing this option in Manager is useless... But, 'rules.json' files are rarely stored on ReverseProxy.
Design proposition
Append an option to set RULES_URL parameter by using Manager to avoid adding an uswgi_param directive for each DevOps VHost.