description: respect markdown for man page format.

So that description sections in man pages maintain the markdown
formatting which is converted to troff sequences.
0.8.88
Experiment with command aliases in auto synopsis.
usage: show all command aliases.

Such that when building command usage synopsis each command name is
listed along with the automatic usage string.

Initially (and much easier is install|ins|i) but this seems confusing in
the synopsis so the decision was made to have some repetition (ie, in
the automatic option string) but increase legibility of command aliases
(names).
0.8.89