added the xmpp.net badge

static/services.html

@@ -42,6 +42,9 @@
  <div class="wrapper" style="background-color: white; position: relative;">
   <img class="btnimg" src="/img/xmpp.svg" style="position: absolute; right: 2px; top: 0px;"></img><h3 style="display: inline-grid">lain.church XMPP</h3>
   <p><a href="https://en.wikipedia.org/wiki/XMPP">XMPP</a> provides secure instant messaging with features such as media integration, read receipts, server-side history, multi-user chat rooms and most importantly, end-to-end encryption.</p>
+  <p style="text-align: center;">
+  <a href='https://xmpp.net/result.php?domain=lain.church&amp;type=client'><img src='https://xmpp.net/badge.php?domain=lain.church' alt='xmpp.net score' /></a>
+  </p>
   <p>lain.church runs a <a href="http://prosody.im/">Prosody</a> server to provide XMPP accounts to the community, tied into one's main lain.church account. Said server supports, among others, the following <span title="XMPP Extension Protocols" style="border-bottom:1px dashed #999">XEPs</span>:</p>
   <ul>
    <li><b>XEP-0163</b>: PEP (Avatars/OMEMO)</li>