Introduce autorotating secrets for security

Change-Id: I25a4c44841e13ee1d151c87cdaaeedc5ab704765
diff --git a/.gitignore b/.gitignore
index 90ca657..84cb25a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 /cache
-/kalamar.secret
+/kalamar.secret*
 /start-test
 /todo.org
 /fixtures.txt