This cert has an invalid serial number of 0. According to RFC 5280 serial
numbers should be positive.

The certificate data can be updated/regenerated with the
net/data/parse_certificate_unittest/regenerate_pem_from_ascii.py script.

#-----BEGIN SERIAL-----
    INTEGER { `00` }
#-----END SERIAL-----

-----BEGIN CERTIFICATE-----
MIICUDCCAbmgAwIBAgIBADANBgkqhkiG9w0BAQUFADBFMQswCQYDVQQGEwJBVTETMBEGA1UECAwKU29tZS1TdGF0ZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMB4XDTE0MDQyMzIwNTA0MFoXDTE3MDQyMjIwNTA0MFowRTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEA2CvIpjLkYv9N89CtWYtFp73xR78JWHsivTWulyWGlKCAwLQfdpFnRjHQEIS3Ih5wI5FyyOlteTqFd4APxJUWdcVKcUzIYz+j8mOcKk+a+svBcW4ohSigJx5lHK4H1VtvLUPtK5CxjK8kba7pFzoFwb+4HK5lOxtYwtmu1qpniPECAwEAAaNQME4wHQYDVR0OBBYEFIt11azLCL4OH2W3+la+bKd12oWvMB8GA1UdIwQYMBaAFIt11azLCL4OH2W3+la+bKd12oWvMAwGA1UdEwQFMAMBAf8wDQYJKoZIhvcNAQEFBQADgYEAO+h4bZXWPWr3ExksG8KIriKr9I0y9XxxZ88t0RzCw4fi6b6JXOQ0q0iRwj+VritHniV4a0+aEKRy/c/3AgywCgikWuLldH4RHTlgaskfafMuYybcnu9regrhVFeYqnKReAR+H49lTR8LEqycJA+EFBpVLR+78J0JsghcWTJlgCY=
-----END CERTIFICATE-----

WARNING: Serial number is zero

-----BEGIN ERRORS-----
V0FSTklORzogU2VyaWFsIG51bWJlciBpcyB6ZXJvCg==
-----END ERRORS-----