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/http-push.c b/http-push.c
index 40373bc..e73864b 100644
--- a/http-push.c
+++ b/http-push.c
@@ -12,6 +12,7 @@
 #include "exec-cmd.h"
 #include "remote.h"
 #include "list-objects.h"
+#include "setup.h"
 #include "sigchain.h"
 #include "strvec.h"
 #include "packfile.h"