treat nil and empty string the same for comparison
treat nil and empty string the same for comparison


Former-commit-id: 8451862898c7d7aff2d2deacbae858f06d0752f0 [formerly 94f5586650e829d491930d69b8734c74226667d5] [formerly 046cf723251f01ff4bd7be28f7e96466f452f3df [formerly 78e1bf5ab4ea14c84f0c72d71cd9248bdabd4780]]
Former-commit-id: 5d6df81a36fa05c4cb06ba65c8a228734e418805 [formerly c5a5a9a3ec1492b4898460025a09bf2f5898d740]
Former-commit-id: 91e821bff868687b84576c1d73dc3f3f5858f48a
marthag8/rundeck,edwlarkey/rundeck,ARentz07/rundeck,tas50/rundeck,ARentz07/rundeck,edwlarkey/rundeck,ARentz07/rundeck,ronabop/rundeck,marthag8/rundeck,marthag8/rundeck,edwlarkey/rundeck,tas50/rundeck,ronabop/rundeck,ronabop/rundeck,tas50/rundeck