Add copyright notices.
The tool interface sucks (especially "committing" information, which is just
me doing everything by hand from the command line), but I think this is in
theory actually a viable way of describing the world. So copyright it.
diff --git a/update-cache.c b/update-cache.c
index 5085a5c..0bcd5d4 100644
--- a/update-cache.c
+++ b/update-cache.c
@@ -1,3 +1,8 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
#include "cache.h"
static int cache_name_compare(const char *name1, int len1, const char *name2, int len2)
