title: pysvn checkout error ""Server SSL certificate verification failed: issuer is not trusted". on proxy server
body: <p>I'm trying to do SVN checkout using <code>pysvn</code>, but facing the error:</p>
  
  <blockquote>
    <p>Server SSL certificate verification failed: issuer is not trusted</p>
  </blockquote>
  
  <p>We are using a proxy URL to checkout. Manual checkout and <code>svn</code> command line checkout work fine on this URL.</p>
  
  <p>Please suggest any solution how to checkout proxy SVN URL using <code>pysvn</code>.</p>
  
  <pre><code>client = pysvn.Client()
  client.callback_ssl_server_trust_prompt = ssl_server_trust_prompt
  client.callback_get_login = get_login
  client.checkout(&lt;URL&gt;, &lt;PATH&gt;, recurse=True)
  </code></pre>