Fixes to easy-rsa/2.0

Fixes to easy-rsa/2.0

As support for OpenSSL 1.0.0 requires a modified openssl.cnf file, it was
decided to rename openssl.cnf to openssl-1.0.0.cnf for clarity and better
support of different OpenSSL versions. The old openssl.cnf was renamed as
openssl-0.9.8.cnf.

This patch makes sure that all openssl*.cnf files are copied when running 'make
install' in easy-rsa and makes the whichopensslcnf script aware of them as well.

Signed-off-by: Samuli Seppänen <samuli@openvpn.net>
Acked-by: David Sommerseth <davids@redhat.com>
Signed-off-by: David Sommerseth <davids@redhat.com>