fixes #19: Adding issue 19 to changelog (duplicate of #137)

With issue #137 fixed, issue #19 can be closed.

Author: guusdk

changelog.html

@@ -47,6 +47,7 @@ <h1>
 <p><b>2.2.0</b> -- (tbd)</p>
 <ul>
     <li>[<a href='https://issues.igniterealtime.org/browse/OF-2157'>OF-2157</a>] - SequenceManager generated IDs are unreliable whilst clustering.</li>
+    <li>[<a href='https://github.com/igniterealtime/openfire-monitoring-plugin/issues/19'>Issue #19</a>] - Monitoring / Archive plugin fails to reconstruct archived stanza</li>
     <li>[<a href='https://github.com/igniterealtime/openfire-monitoring-plugin/issues/137'>Issue #137</a>] - MUC messages duplicated as one-on-one messages</li>
     <li>[<a href='https://github.com/igniterealtime/openfire-monitoring-plugin/issues/138'>Issue #138</a>] - Stanzas not always stored for one-to-one messages whilst clustered</li>
     <li>[<a href='https://github.com/igniterealtime/openfire-monitoring-plugin/issues/139'>Issue #139</a>] - Reduce code complexity</li>