[PATCH v3] doc: build manpages as well as html output

[Thomas Monjalon]

3/08/2023, Bruce Richardson:
> +#set up common doxygen configuration

A space is missing here

> +man_cdata.set('FULL_PATH_NAMES', 'NO')

Why it has to be disabled? Maybe add a comment?

> +    meson.add_install_script(mandb)

When is it executed exactly?
Will it update the database in case we install in a staging directory,
when preparing a package for later deploying on another machine?

> +.. code-block:: console
> +
> +    export MANPATH=:/path/to/build/doc/api/man

Styling consideration: I think we should indent with 3 spaces
so it is aligned with "code-block".