Display the warning ASAP to help not wasting time for newcomers. All kind of
contributions are expected at the mailing lists to bring posts a wider audience.
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
This is a great move to help contributors in maintaining documentation.
While doing huge changes in this area, do a bit more than simply SGML to rst:
* move README from markdown to rst
* make a "true" man page with no more information
* refactor content and sections
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>