- Add info to error 500 page

apps/routerconsole/jsp/error500.jsp

@@ -55,9 +55,14 @@
 <p>
 <b>I2P version:</b> <%=net.i2p.router.RouterVersion.FULL_VERSION%><br>
 <b>Java version:</b> <%=System.getProperty("java.vendor")%> <%=System.getProperty("java.version")%> (<%=System.getProperty("java.runtime.name")%> <%=System.getProperty("java.runtime.version")%>)<br>
+<b>Wrapper version:</b> <%=System.getProperty("wrapper.version", "none")%><br>
+ <jsp:useBean class="net.i2p.router.web.LogsHelper" id="logsHelper" scope="request" />
+ <jsp:setProperty name="logsHelper" property="contextId" value="<%=(String)session.getAttribute("i2p.contextId")%>" />
+<b>Server version:</b> <jsp:getProperty name="logsHelper" property="jettyVersion" /><br>
 <b>Platform:</b> <%=System.getProperty("os.name")%> <%=System.getProperty("os.arch")%> <%=System.getProperty("os.version")%><br>
 <b>Processor:</b> <%=net.i2p.util.NativeBigInteger.cpuModel()%> (<%=net.i2p.util.NativeBigInteger.cpuType()%>)<br>
 <b>Jbigi:</b> <%=net.i2p.util.NativeBigInteger.loadStatus()%><br>
-<b>Encoding:</b> <%=System.getProperty("file.encoding")%></p>
+<b>Encoding:</b> <%=System.getProperty("file.encoding")%><br>
+<b>Charset:</b> <%=java.nio.charset.Charset.defaultCharset().name()%></p>
 <p><%=intl._("Note that system information, log timestamps, and log messages may provide clues to your location; please review everything you include in a bug report.")%></p>
 </div></body></html>