- add missing `--mounthost=host' option (and adjust the list width
  for that);
- use more common option list header line;
- correct argument names of `--src' and `--xsrc' in the text;
- correct default `xsrcdir' directory;
- choose different argument wording (then also using appropriate
  macro) in the arbitrary sandbox command running explanation (and
  adjust the list width with it);
- add comma after ``e.g.'';
- bump date.

>From Bug Hunting.

(wiz)