title: git-credential-winstore prompt does not work with self hosted repositories
body: <p>git-credential-winstore works perfect with github and bitbucket repositories, but the prompt does not pop up while working with self hosted repositories. I can' t see what the problem is.</p>
  
  <p>I' ve tried :</p>
  
  <pre><code>git config --global credential.helper winstore
  </code></pre>
  
  <p>via console </p>
  
  <pre><code>[credential]
      helper = winstore
  </code></pre>
  
  <p>in gitconfig and created and stored the credentials manualy. Without success.
  Can anyone point me to te right direction please? Im using Win7.</p>
  
  <p>Best regards.</p>