Merge pull request #1050 from atc0005/i1044-add-cert-signature-algori…

…thm-to-payload-stable-branch

Add Cert Signature Algorithm to cert payload

cmd/check_cert/paypload.go

@@ -227,6 +227,7 @@ func buildCertSummary(cfg *config.Config, validationResults certs.CertChainValid
 			ValidityPeriodDays:        certExpMeta.validityPeriodDays,
 			Summary:                   expiresText,
 			Status:                    certStatus,
+			SignatureAlgorithm:        origCert.SignatureAlgorithm.String(),
 			Type:                      certs.ChainPosition(origCert, certChain),
 		}