Currently discuss post (through mail or sms) does not allow the author
to be notified of its content, as
* he posted it and is therefore already updated;
* it could create email loops;
However with SMS one could easily try to send SMS to himself using the
sms composer that is different from the mail composer. In that case
just use the ``mail_notify_author`` context key allowing to bypass the
"no author notification" rule.
Task ID 2091685
PR #40650
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>