mrlg: Remove obsolete version.

* mrlg.cgi: The version we shipped was very much  out of date, remove it.
* mrlg.txt: Add file pointing to the official MRLG site.
diff --git a/tools/mrlg.txt b/tools/mrlg.txt
new file mode 100644
index 0000000..0ebf7ee
--- /dev/null
+++ b/tools/mrlg.txt
@@ -0,0 +1,5 @@
+The Multi-Router Looking Glass (MRLG) CGI script now lives at:
+
+  http://mrlg.op-sec.us/
+
+Please obtain the latest version from there.