title: Checking job exists within a folder in jenkins using REST
body: <p>I can check that a job exists if there is no folder:</p>
  
  <p><a href="http://myJenkinsInstance:8080/checkJobName?value=TestJob101" rel="nofollow noreferrer">http://myJenkinsInstance:8080/checkJobName?value=TestJob101</a></p>
  
  <p>What I am can't to work out is how do I check for a job that is within a folder please when I am using the folders plugin.</p>
  
  <p>e.g. 
  <a href="http://myJenkinsInstance:8080/job/MyFolder/job/TestJob101/" rel="nofollow noreferrer">http://myJenkinsInstance:8080/job/MyFolder/job/TestJob101/</a></p>
  
  <p><a href="http://myJenkinsInstance:8080/checkJobName?value=job/MyFolder/job/TestJob101/" rel="nofollow noreferrer">http://myJenkinsInstance:8080/checkJobName?value=job/MyFolder/job/TestJob101/</a></p>
  
  <p>returns:</p>
  
  <pre><code>‘/’ is an unsafe character
  </code></pre>