Issue #3157963 by shailja179, ravi.shankar, kiamlaluno, davidhernandez,...

Issue #3157963 by shailja179, ravi.shankar, kiamlaluno, davidhernandez, joachim: The link given in FormState::setRedirect() for the page explaining what values are available for $options param takes to a class documentation page

(cherry picked from commit d6b4ca71)