Allow running a default configuration with TLS libraries without BF-CBC

Allow running a default configuration with TLS libraries without BF-CBC

Modern TLS libraries might drop Blowfish by default or distributions
might disable Blowfish in OpenSSL/mbed TLS. We still signal OCC
options with BF-CBC compatible strings. To avoid requiring BF-CBC
for this, special this one usage of BF-CBC enough to avoid a hard
requirement on Blowfish in the default configuration.

This patch is cherry-picked from 79ff3f79 and the missing
ciphername = "none"; has been added in the OCC code.

Due to uncrustify complains, a few extra whitespace fixes had to be
done to options.c.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20220603095219.637361-1-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg24456.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>