Applied patch from Vladimir N. Oleynik <dzo@simtreas.ru> to do tab-completion
in Busybox shell. (Thanks, Vlad.)
diff --git a/Config.h b/Config.h
index cff23e4..5e14b40 100644
--- a/Config.h
+++ b/Config.h
@@ -260,7 +260,11 @@
// Enable tab completion in the shell (not yet
// working very well -- so don't turn this on)
// Only relevant if BB_SH is enabled.
-//#define BB_FEATURE_SH_TAB_COMPLETION
+#define BB_FEATURE_SH_TAB_COMPLETION
+//
+// Attempts to match usernames in a ~-prefixed path
+// XXX: Doesn't work without NSS, off by default
+//#define BB_FEATURE_USERNAME_COMPLETION /* require NSS */
//
//Turn on extra fbset options
//#define BB_FEATURE_FBSET_FANCY