Update mainpage.dox to remove link to oldkea.isc.org

diff --git a/doc/devel/mainpage.dox b/doc/devel/mainpage.dox
index 031b158cc052b5fd665f0e5d2aedc12af8920fbf..a70f102cacfdcb2cc4d6a63994c87a0bbbadaaa9 100644 (file)
--- a/doc/devel/mainpage.dox
+++ b/doc/devel/mainpage.dox
@@ -22,7 +22,7 @@
  *
  * If you are a user or system administrator, rather than software engineer,
  * you should read the
- * <a href="http://oldkea.isc.org/docs/kea-guide.html">Kea
+ * <a href="https://kb.isc.org/docs/kea-administrator-reference-manual">Kea
  * Administrator Reference Manual</a> instead. If you are using a beta or
  * development version of Kea, the
  * <a href="http://git.kea.isc.org/~tester/kea/guide/kea-guide.html">