RPM spec: require openssl on older RHEL and openssl-libs on newer
RPM spec: require openssl on older RHEL and openssl-libs on newer

orthrus/librdkafka,janmejay/librdkafka,janmejay/librdkafka,orthrus/librdkafka,senior7515/librdkafka,senior7515/librdkafka,janmejay/librdkafka,klonikar/librdkafka,klonikar/librdkafka,orthrus/librdkafka,orthrus/librdkafka,janmejay/librdkafka,senior7515/librdkafka,klonikar/librdkafka,senior7515/librdkafka,klonikar/librdkafka