Removed clients' headers from list, removed Access-Control-Allow-Headers or Access-Control-Allow-Methods either, because used only for OPTIONS request handled by web server itself (before web-proxy page).
Removed clients' headers from list, removed Access-Control-Allow-Headers or Access-Control-Allow-Methods either, because used only for OPTIONS request handled by web server itself (before web-proxy page).

Esri/resource-proxy,Esri/resource-proxy