Disable export ciphers by default for OpenSSL builds.

Disable export ciphers by default for OpenSSL builds.

Export ciphers are deliberately weak ciphers, and not fully supported by
OpenVPN since ephemeral RSA support has been removed a few commits ago.
This commit removes them from the default cipher list to avoid confusion.

PolarSSL does not support export ciphers, so no action required there.

Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1388607026-12297-7-git-send-email-steffan@karger.me>
URL: http://article.gmane.org/gmane.network.openvpn.devel/8146
Signed-off-by: Gert Doering <gert@greenie.muc.de>