Add support for cloning over http

This patch implements basic support for cloning over http, based on the
work on git-http-backend by Shawn O. Pearce.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

html.c

@@ -51,6 +51,13 @@ void htmlf(const char *format, ...)
 	html(buf);
 }
 
+void html_status(int code, int more_headers)
+{
+	htmlf("Status: %d\n", code);
+	if (!more_headers)
+		html("\n");
+}
+
 void html_txt(char *txt)
 {
 	char *t = txt;