SSL_FLAG_VFY_SRV
SSL_FLAG_VFY_SRV("Request", SSL_VERIFY_PEER),
SSL_FLAG_VFY_SRV("Require",
SSL_FLAG_VFY_SRV("Once", SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE),
SSL_FLAG_VFY_SRV("RequestPostHandshake",
SSL_FLAG_VFY_SRV("RequirePostHandshake",