5a57a7f095
* Usage goes to stderr, not stdout * Use correct argument markup * bsdtar --help no longer exits with an error return code * ensure that the word "bsdtar" appears in the first line output from "bsdtar --help" (even if the program is invoked as "tar") In particular, scripts can now test for the presence of bsdtar. For example, in /bin/sh: if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1) then \ echo bsdtar; else echo not bsdtar; fi