<h4>Pre-Submission Checklist</h4>



<ul class="contains-task-list">
<li>[x ] Commit message has the format required by CONTRIBUTING guide</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Commits are split per component (core, individual modules, libs, utils, ...)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Each component has a single commit (if not, squash them into one commit)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> No commits to README files for modules (changes must be done to docbook files<br>
in <code>doc/</code> subfolder, the README file is autogenerated)</li>
</ul>
<h4>Type Of Change</h4>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Small bug fix (non-breaking change which fixes an issue)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> New feature (non-breaking change which adds new functionality)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Breaking change (fix or feature that would change existing functionality)</li>
</ul>
<h4>Checklist:</h4>

<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> PR should be backported to stable branches</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Tested changes locally</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Related to issue #XXXX (replace XXXX with an open issue number)</li>
</ul>
<h4>Description</h4>

<p>Histogram metric and minor issues.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/kamailio/kamailio/pull/2435'>https://github.com/kamailio/kamailio/pull/2435</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>xhttp_prom: add support for histogram metrics.</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2435/files#diff-5a68b70aa9d4d1d8061f72a49ff05334">src/modules/xhttp_prom/doc/xhttp_prom_admin.xml</a>
    (203)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2435/files#diff-1e11c6ada836de708e2a06cb54a4d7b0">src/modules/xhttp_prom/prom.c</a>
    (102)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2435/files#diff-0e4adc08ef9189f2293b9acc2e8287bd">src/modules/xhttp_prom/prom.h</a>
    (21)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2435/files#diff-0536484bcf6af64779aa59da8a477ddb">src/modules/xhttp_prom/prom_metric.c</a>
    (909)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2435/files#diff-164f8fced43996695f3b2b45dd142d3c">src/modules/xhttp_prom/prom_metric.h</a>
    (50)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2435/files#diff-66a6d8e001e454e7bba3c2a74ee8c43a">src/modules/xhttp_prom/xhttp_prom.c</a>
    (630)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2435/files#diff-1230aef0622966b20d374e9faa5d41c4">src/modules/xhttp_prom/xhttp_prom.h</a>
    (25)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/kamailio/kamailio/pull/2435.patch'>https://github.com/kamailio/kamailio/pull/2435.patch</a></li>
  <li><a href='https://github.com/kamailio/kamailio/pull/2435.diff'>https://github.com/kamailio/kamailio/pull/2435.diff</a></li>
</ul>

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