Repair --inetd

Repair --inetd

commit 25a422cc60 deprecated --inetd, which is still something we want.

Unlike all "usual" deprecated option warnings, we cannot print this at
option parsing time, because we need logging to be set up first - otherwise
the deprecation warning is sent via the socket (on stdin/stdout)
towards the connecting client, totally breaking this mode.

(Which is why we want to deprecate it: too special even for us)

Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20200724181324.19037-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg20574.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>