Map restart signals from event loop to SIGTERM during exit-notification wait

Map restart signals from event loop to SIGTERM during exit-notification wait

Commit 63b3e000c9.. fixed SIGTERM getting lost during exit notification
by ignoring any restart signals triggered during this interval. However,
as reported in Trac 777, this could result in repeated triggering of
restart signals when the event loop cannot continue without restart due
to IO errors or timeout.

Avoid by converting soft SIGUSR1 and SIGHUP signals received during
exit-notify wait period to SIGTERM.

Trac #777

Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1480386424-30876-1-git-send-email-selva.nair@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg13284.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>