title: jenkins not responding to github webhook`
body: <p>I got Jenkins talking to Github, and manually I can initiate a build and it succeeds! This is a private Github repo. </p>
  
  <p>I can't get the webhook to work, so that when I check-in in my repo, Jenkins would pull and auto build?</p>
  
  <p>I put a service hook under Jenkins (GitHub plugin). Testing the hook shows "Payload deployed"</p>
  
  <p>This is what my hook looks like
  <a href="http://myjenkinsurl.com:8080/github-webhook/" rel="nofollow">http://myjenkinsurl.com:8080/github-webhook/</a></p>
  
  <p>In the Jenkins config, I selected "Manually manage hook URLs"</p>