dco: turn supported ciphers list into a function

dco: turn supported ciphers list into a function

Other platforms may need more complex logic to decide whether a cipher
is supported or not, therefore turn hardcoded list into a function that
can be implemented by each platform independently.

Signed-off-by: Lev Stipakov <lev@openvpn.net>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Heiko Hund <heiko@ist.eigentlich.net>
Message-Id: <20220807100404.8618-1-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg24835.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>