Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
expn version (return code: 0)
b6ed01d30c68: Could not connect: Connection refused
<version> b6ed01d30c68: Could not connect: Connection refused
expn --help (return code: 255)
Usage: /usr/bin/expn [-1avwd] user[@host] [user2[host2] ...] at /usr/bin/expn line 123.