Linkchecker not working with proxy

[alfador1]

Summary

Whenever I use linkchecker version 10.1.0 in Jenkins and needing proxy it doesn't work.
Curl command works perfectly, but for sure not the linkchecker:

00:00:05.551  <tr><td class="error">Result</td><td class="error">Error: ConnectionError: HTTPSConnectionPool(host=&#x27;www.dhl.com&#x27;, port=443): Max retries exceeded with url: /sy-ar-two-zero/home.html (Caused by NewConnectionError(&#x27;&lt;urllib3.connection.VerifiedHTTPSConnection object at 0x7f9b80f5bef0&gt;: Failed to est...</td></tr>
00:00:06.516  </table><br/><br/><i>Statistics</i><br/>

Steps to reproduce

1. export https_proxy with your url
2. Run linkchecker
3. Observer the error mentioned above

Curl command works perfectly with the same url, but with linkchecker it doesn't work

Actual result

Expected result

Environment

• Operating system:
• Linkchecker version: 10.1.0
• Python version: 3
• Install method: pip3 install --user linkchecker