title: How can I add a proxy server to the jira plugin in jenkins
body: <p>I my jenkins job, I need to check the blocked issues in jira, if there is any issued in blocked level. than the job will stop.</p>
  
  <p>the jenkins server is in the inner network of our custom company. The Jira server is in our office and published to the internet.</p>
  
  <p>so the jenkins server need to using a proxy server to access the lira server.</p>
  
  <p>but I can't find the way to config the proxy server.(In the 'Manager Plugins' page of jenkins there has been set a proxy, but it seems not work for lira plugin)</p>