Merge pull request #5088 from aymenBox/patch-1

Update sample-config.json let's encrypt section

sample-config.json

@@ -25,6 +25,7 @@
     "__comment__": "Requires NodeJS 8.x or better, Go to https://letsdebug.net/ first before trying Let's Encrypt.",
     "email": "myemail@mydomain.com",
     "names": "myserver.mydomain.com",
+    "skipChallengeVerification": true,
     "production": false
   }
 }