LibreSSL-3.4.2 introduced cert revocation check behaviour change, for some checks now X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY (20) is returned. https://github.com/libressl-portable/portable/issues/697 let us modify vtc accordingly
File list: - common.pem: PEM file which may be used by most of the VTC files.