CMP is defined in RFC 4210 (and CRMF in RFC 4211).
+So far the CMP server implementation is limited to one request per CMP message
+(and consequently to at most one response component per CMP message).
+
=head1 RETURN VALUES
OSSL_CMP_SRV_CTX_new() returns a B<OSSL_CMP_SRV_CTX> structure on success,