Update debug section with info on rescue shell, issue #76

README.md

@@ -421,6 +421,14 @@ Finit is configured with this option, Finit will try to start a bare
 `/bin/sh` on the boot console.  Remember, this is only for debugging
 and would leave your production system potentially wide open.
 
+There is also a rescue shell available, in case Finit crashes and the
+kernel usually reboots: `configure --enable-emergency-shell`.  However,
+the behavior of Finit is severely limited when this is enabled, so use
+it only for debugging start up issues when Finit crashes.
+
+**NOTE:** Both of these configure options *should not* be enabled for
+production systems since they can potentially give a user root access.
+
 
 Origin & References
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