Add interval to stats page

CHANGES.txt

@@ -1,6 +1,7 @@
 2025-xx-xx [0.20.0]
   - Fix dup ids in jetty.xml, existing installs must fix manually,
     s/<Ref id=/<Ref refid=/g
+  - Add interval to stats page
 
 2024-04-07 [0.19.0]
   - Disable full scrape by default

src/jsp/index.jsp

@@ -20,6 +20,7 @@
 <p id="totals">
 <b>Torrents:</b> <%=torrents.size()%><br>
 <b>Peers:</b> <%=torrents.countPeers()%><br>
+<b>Announce Interval:</b> <%=torrents.getInterval() / 60%> minutes<br>
 </p>
 <%
 /*