SCRIPTS: announce-release: place the send command in the mail's header

I'm fed up with having to scroll my terminals trying to look for the
mail send command printed 30 minutes before the release, let's have
it copied into the e-mail template itself, and replace the old headers
that used to be duplicated there and that are not needed anymore.

(cherry picked from commit 0f5ce6014acc7e6cbdcde110f950d367bb19b75b)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 119d44bc34c995845e1f15782af3c15c2993b5d4)
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed