Make diagnostics page a redirect.

Having an actual page there broke the site hierarchy (with the current template).

Author: bgrainger

docs/content/diagnostics/index.md

@@ -71,6 +71,12 @@ to = "/api/MySqlConnector/MySqlTransactionType/"
 status = 301
 force = true
 
+[[redirects]]
+from = "/diagnostics/"
+to = "/"
+status = 302
+force = true
+
 [[redirects]]
 from = "/groups/"
 to = "/"