Add mini ToC for overview
Hooks & Plugins
===============
+* [Plugins](#plugins)
+* [Hooks](#hooks)
+ * [Bootstrap Hooks](#bootstrap-hooks)
+ * [Runtime Hooks](#runtime-hooks)
+ * [Shutdown Hooks](#shutdown-hooks)
+
Finit can be extended to add general functionality in the form of I/O
monitors, built-in inetd services, or hook plugins.
