Update CT log list to include Venafi gen2.

net/data/ssl/certificate_transparency/log_list.json

 {
  "logs": [
   {
    "description": "Google 'Aviator' log",
    "key": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE1/TMabLkDpCjiupacAlP7xNi0I1JYP8bQFAHDG1xhtolSY1l4QgNRzRrvSe8liE+NPWHdjGxfx3JhTsN9x8/6Q==",
    "url": "ct.googleapis.com/aviator/",
    "maximum_merge_delay": 86400,
    "operated_by": [
     0
    ],
@@ skipping 112 matching lines @@
    "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAolpIHxdSlTXLo1s6H1OCdpSj/4DyHDc8wLG9wVmLqy1lk9fz4ATVmm+/1iN2Nk8jmctUKK2MFUtlWXZBSpym97M7frGlSaQXUWyA3CqQUEuIJOmlEjKTBEiQAvpfDjCHjlV2Be4qTM6jamkJbiWtgnYPhJL6ONaGTiSPm7Byy57iaz/hbckldSOIoRhYBiMzeNoA0DiRZ9KmfSeXZ1rB8y8X5urSW+iBzf2SaOfzBvDpcoTuAaWx2DPazoOl28fP1hZ+kHUYvxbcMjttjauCFx+JII0dmuZNIwjfeG/GBb9frpSX219k1O4Wi6OEbHEr8at/XQ0y7gTikOxBn/s5wQIDAQAB",
    "url": "ctlog.api.venafi.com/",
    "maximum_merge_delay": 86400,
    "operated_by": [
     6
    ],
    "disqualified_at": 1488307346,
    "dns_api_endpoint": "venafi.ct.googleapis.com"
   },
   {
+   "description": "Venafi Gen2 CT log",
+   "key": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEjicnerZVCXTrbEuUhGW85BXx6lrYfA43zro/bAna5ymW00VQb94etBzSg4j/KS/Oqf/fNN51D8DMGA2ULvw3AQ==",
+   "url": "ctlog-gen2.api.venafi.com/",
+   "maximum_merge_delay": 86400,
+   "operated_by": [
+    6
+   ],
+   "dns_api_endpoint": "venafi2.ct.googleapis.com"
+  },
+  {
    "description": "CNNIC CT log",
    "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv7UIYZopMgTTJWPp2IXhhuAf1l6a9zM7gBvntj5fLaFm9pVKhKYhVnno94XuXeN8EsDgiSIJIj66FpUGvai5samyetZhLocRuXhAiXXbDNyQ4KR51tVebtEq2zT0mT9liTtGwiksFQccyUsaVPhsHq9gJ2IKZdWauVA2Fm5x9h8B9xKn/L/2IaMpkIYtd967TNTP/dLPgixN1PLCLaypvurDGSVDsuWabA3FHKWL9z8wr7kBkbdpEhLlg2H+NAC+9nGKx+tQkuhZ/hWR65aX+CNUPy2OB9/u2rNPyDydb988LENXoUcMkQT0dU3aiYGkFAY0uZjD2vH97TM20xYtNQIDAQAB",
    "url": "ctserver.cnnic.cn/",
    "maximum_merge_delay": 86400,
    "operated_by": [
     7
    ],
    "dns_api_endpoint": "cnnic.ct.googleapis.com"
   },
   {
@@ skipping 53 matching lines @@
   {
    "name": "StartSSL",
    "id": 8
   },
   {
    "name": "Beijing PuChuangSiDa Technology Ltd.",
    "id": 9
   }
  ]
 }