BUG/MINOR: systemd: propagate the correct signal to haproxy

Some people report that sometimes there's a collection of old processes
after a restart of the systemd wrapper. It's not surprizing when reading
the code, the SIGTERM is propagated as a SIGINT which asks for a graceful
stop instead. If people ask for termination, we should terminate.
(cherry picked from commit 6c2f7955e7300fb2cf0596fa5210cdeb3a2aea5f)
(cherry picked from commit 502674bb0856618b227b57604f14298b8f3ad29d)
1 file changed