Add geoip support and flag icons

apps/routerconsole/jsp/flags.jsp

@@ -0,0 +1,27 @@
+<%
+/*
+ * USE CAUTION WHEN EDITING
+ * Trailing whitespace OR NEWLINE on the last line will cause
+ * IllegalStateExceptions !!!
+ */
+
+/**
+ *  flags.jsp?c=de => icons/flags/de.png
+ *  with headers set so the browser caches.
+ */
+boolean rendered = false;
+String c = request.getParameter("c");
+if (c != null && c.length() > 0) {
+    java.io.OutputStream cout = response.getOutputStream();
+    response.setContentType("image/png");
+    response.setHeader("Cache-Control", "max-age=86400");  // cache for a day
+    try {
+        net.i2p.util.FileUtil.readFile(c + ".png", "icons/flags", cout);
+        rendered = true;
+    } catch (java.io.IOException ioe) {}
+    if (rendered)
+        cout.close();;
+}
+if (!rendered)
+    response.sendError(404, "Not found");
+%>