title: EnvVar SVN_REVISION and SVN_URL not set
body: <p>The environment variables %SVN_REVISION% and %SVN_URL% aren't set when I use a SVN repository running on a Visual SVN server. All other SVN interactions work fine, e.g. checkout and change detection. Running the job with another SVN server works too.</p>
  
  <p>Freestyle job configuration:</p>
  
  <pre><code>Repository URL:            http://SERVERNAME:81/svn/Projects/ProjectName__5_9_1_3/trunk
  Local module directory:    trunk
  Repository depth option:   infinity
  </code></pre>
  
  <p>Output of windows set command in the build operation (SVN_REVISION and SVN_URL missing)</p>
  
  <pre><code>...
  SESSIONNAME=RDP-Tcp#0
  SystemDrive=C:
  SystemRoot=C:\Windows
  ...
  </code></pre>
  
  <p>System information</p>
  
  <ul>
  <li>Jenkins: v1.531</li>
  <li>Subversion plugin: v1.51</li>
  <li>JAVA Runtime: v1.6.0_35</li>
  <li>VisualSVN Server: v2.7</li>
  </ul>