This patch enables the previously created manpages in the sphinx
configuration file. It also enables "man_show_urls" because the
manpages include several external links.
This extension enables the usage of .. todo:: blocks. This is quite
useful because we can encourage people to work on particular sections
of the documentation.
- Move the configuration values to the appropriate position in the file.
- Setting "html_theme_path" is not needed.
- Enable "html_last_updated_fmt". It is quite useful to determine the
last documentation update. IMO it does not harm at all.