import minio/pkg/certs as xcerts (#473)

update dependency to fix windows cert issues,
now handled properly by the pkg/certs package
in MinIO.

restapi/server.go

@@ -298,7 +298,7 @@ func (s *Server) Serve() (err error) {
 			caCertPool := x509.NewCertPool()
 			ok := caCertPool.AppendCertsFromPEM(caCert)
 			if !ok {
-				return fmt.Errorf("cannot parse CA certificate")
+				return fmt.Errorf("unable to parse CA certificate %s", s.TLSCACertificate)
 			}
 			httpsServer.TLSConfig.ClientCAs = caCertPool
 			httpsServer.TLSConfig.ClientAuth = tls.RequireAndVerifyClientCert