pundit: convert ip addresses to pundit.

test/functional/ip_addresses_controller_test.rb

@@ -34,6 +34,11 @@ class IpAddressesControllerTest < ActionDispatch::IntegrationTest
         get_auth ip_addresses_path(search: { user_id: @user.id, group_by: "ip_addr" }), @mod
         assert_response :success
       end
+
+      should "not allow non-moderators to view IP addresses" do
+        get_auth ip_addresses_path, @user
+        assert_response 403
+      end
     end
   end
 end