Allow for people to select no default shell
diff --git a/shell/Config.in b/shell/Config.in
index 3f5d532..69f8482 100644
--- a/shell/Config.in
+++ b/shell/Config.in
@@ -7,7 +7,7 @@
 
 choice
 	prompt "Choose your default shell"
-	default "ash"
+	default "none"
 	help
 	  Please submit a patch to add help text for this item.
 
@@ -23,6 +23,9 @@
 config CONFIG_FEATURE_SH_IS_MSH
 	bool "msh"
 
+config CONFIG_FEATURE_SH_IS_NONE
+	bool "none"
+
 endchoice
 
 if CONFIG_FEATURE_SH_IS_ASH