<p>some UAs send very low expires values for subscriptions flooding the server with subscribe/notify messages</p>

<p>this pr allows a minimum expire value for subscriptions.</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/77'>https://github.com/kamailio/kamailio/pull/77</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>Update presence.c</li>
  <li>Update presence.h</li>
  <li>Update subscribe.h</li>
  <li>Update subscribe.c</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/77/files#diff-0">modules/presence/presence.c</a>
    (8)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/77/files#diff-1">modules/presence/presence.h</a>
    (1)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/77/files#diff-2">modules/presence/subscribe.c</a>
    (11)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/77/files#diff-3">modules/presence/subscribe.h</a>
    (4)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/kamailio/kamailio/pull/77.patch'>https://github.com/kamailio/kamailio/pull/77.patch</a></li>
  <li><a href='https://github.com/kamailio/kamailio/pull/77.diff'>https://github.com/kamailio/kamailio/pull/77.diff</a></li>
</ul>

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