Change proto_remote() function to return a constant string

Change proto_remote() function to return a constant string

Instead of using the implicit protocol string that is returned by the
proto/af to names function return a constant string. The strings have
become part of the wire protocl and we do not want them to change if
the printing of proto/af changes.

Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1385382680-5912-2-git-send-email-arne@rfc2549.org>
URL: http://article.gmane.org/gmane.network.openvpn.devel/8055

Signed-off-by: Gert Doering <gert@greenie.muc.de>