[MM-37772] Idiomatic naming (URL, URI, API) (#18128)

* s/Url/URL/g & s/Uri/URI/g

* s/Api/API/g

api4/permission.go

@@ -12,14 +12,14 @@ import (
 )
 
 func (api *API) InitPermissions() {
-	api.BaseRoutes.Permissions.Handle("/ancillary", api.ApiSessionRequired(appendAncillaryPermissions)).Methods("GET")
+	api.BaseRoutes.Permissions.Handle("/ancillary", api.APISessionRequired(appendAncillaryPermissions)).Methods("GET")
 }
 
 func appendAncillaryPermissions(c *Context, w http.ResponseWriter, r *http.Request) {
 	keys, ok := r.URL.Query()["subsection_permissions"]
 
 	if !ok || len(keys[0]) < 1 {
-		c.SetInvalidUrlParam("subsection_permissions")
+		c.SetInvalidURLParam("subsection_permissions")
 		return
 	}