fixup: change init_key_type() param name in declaration too

fixup: change init_key_type() param name in declaration too

Commit 66407e11 changed the name of the cfb_ofb_allowed parameter of the
init_key_type() implementation to 'tls_mode', but forgot to do the same in
the function declaration.

Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1460886980-12925-1-git-send-email-steffan@karger.me>
URL: http://article.gmane.org/gmane.network.openvpn.devel/11445
Signed-off-by: Gert Doering <gert@greenie.muc.de>