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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - Link to external data sometimes results in HTTP 503"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=108141">108141</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Link to external data sometimes results in HTTP 503
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>LibreOffice
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>5.3.3.2 release
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>UNCONFIRMED
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Calc
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>libreoffice-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>joerg.abdinghoff@googlemail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Description:
Some external webpages which worked flawlessly in LO 5.2 cannot be reached
using LO 5.3.
Example page:
<a href="https://www.comdirect.de/inf/musterdepot/pmd/freunde.html?portfolio_key=20988622402053762302148167949227215202483552575810349595866291873600993993993">https://www.comdirect.de/inf/musterdepot/pmd/freunde.html?portfolio_key=20988622402053762302148167949227215202483552575810349595866291873600993993993</a>


Steps to Reproduce:
1. Open Calc
2. Select Sheet -> Link to External data...
3. Use URL
<a href="https://www.comdirect.de/inf/musterdepot/pmd/freunde.html?portfolio_key=20988622402053762302148167949227215202483552575810349595866291873600993993993">https://www.comdirect.de/inf/musterdepot/pmd/freunde.html?portfolio_key=20988622402053762302148167949227215202483552575810349595866291873600993993993</a>
and press Enter


Actual Results:  
Error message: "Error reading data from the Internet. Server error message: 503
Service Unavailable"

Expected Results:
An import dialog shoud appear.


Reproducible: Always

User Profile Reset: Yes

Additional Info:
Also tried using Portable Version.
Error exists since the first 5.3xxx-release. Works perfectly fine in 5.2.7.2
and below.


User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36
(KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36</pre>
        </div>
      </p>


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