Merged r22633 from trunk to 5.1-stable (#40099).

git-svn-id: https://svn.redmine.org/redmine/branches/5.1-stable@22634 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/users_controller.rb

@@ -48,6 +48,7 @@ class UsersController < ApplicationController
     # API backwards compatibility: handle legacy filter parameters
     unless request.format.html?
       if params.include?(:status) && params[:status].blank?
+        ActiveSupport::Deprecation.warn "Getting all users from API using an empty status param (status=) is deprecated and it will be removed in Redmine 6.0. Please use \"status=*\"."
         @query.add_filter 'status', '*'
       end
       if name = params[:name].presence