Message 296158 - Python tracker

Serhiy and Victor suggest moving this option to regrtest. open a new PR 2238 addressed this.

Also, because moving into regrtest, some test that used `requires` will need to pass option when using it. e.g.:

  $ ./python -m test test.test_curses --list-cases -ucurses

otherwise, it will just passout and do nothing (maybe it should warn user?)