Crash in options.c

Crash in options.c

When compiling with --disable-crypto, openvpn would crash on --help as
commit 5d429efd97 introduce and extra %d into the "usage_message" string
but forgot to add it to the #ifndef ENABLE_CRYPTO fprintf() call.

Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <9d41f9dd-a587-5c1e-2e0d-ebb6c921f4ae@yahoo.no>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg13808.html

Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit 49629380a7bdba25c24c9d410b79946fe29249f0)