setup.h: move declarations for setup.c functions from cache.h

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/archive.c b/archive.c
index 7aeaaf3..cdce5b7 100644
--- a/archive.c
+++ b/archive.c
@@ -5,6 +5,7 @@
 #include "environment.h"
 #include "gettext.h"
 #include "hex.h"
+#include "setup.h"
 #include "refs.h"
 #include "object-store.h"
 #include "commit.h"