Modify OCSP to use alt MD for cert IDs in responses

Modify openssl OCSP utility to produce certIDs in responses using other
hash algorithms (e.g. SHA256).

Added option -rcid for this purpose.

Reviewed-by: Ben Kaduk <kaduk@mit.edu>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5274)