The short option '-?' was removed nine years ago in commit43019189, then restored six years later in5bd92d4c, and then removed again two months later in743100fedue to getopt() returning '?' for options that aren't recognized, preventing the use of '-?' as a valid option. However, getopt() provides a way to check for unrecognized options via the 'optopt' variable, which gets set only for invalid options. Signed-off-by: Mateusz Kazimierczuk <mataha+savannah@protonmail.com> Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>