Add null-parameters-test cases for SHA(), SHA224(), MD5() and MD5_xxx().
ECDHE-ECDSA-AES128-GCM-SHA256
ECDH-ECDSA-AES128-GCM-SHA256
TLS13-AES128-GCM-SHA256
Before creating any new configure files (.conf) read the CONF_FILES_README.md