Ticket 49726 - DS only accepts RSA and Fortezza cipher families

Bug Description:  Currently DS only accepts fortezza and RSA cipher families.
                  This prevents things like ECC certificates from being used.

Fix Description:  Instead of hardcoding the cipher families, just grab the
                  current type and use it.

                  Also cleaned up code: removed unncessary "ifdefs", and switched
                  for loops to use size_t.

https://pagure.io/389-ds-base/issue/49726

Reviewed by: ?