Make "--parents" logs also be incremental

The parent rewriting feature caused us to create the whole history in one
go, and then simplify it later, because of how rewrite_parents() had been
written. However, with a little tweaking, it's perfectly possible to do
even that one incrementally.

Right now, this doesn't really much matter, because every user of
"--parents" will probably generally _also_ use "--topo-order", which will
cause the old non-incremental behaviour anyway. However, I'm hopeful that
we could make even the topological sort incremental, or at least
_partially_ so (for example, make it incremental up to the first merge).

In the meantime, this at least moves things in the right direction, and
removes a strange special case.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

http-push.c

@@ -59,12 +59,12 @@ enum XML_Status {
 #define LOCK_TIME 600
 #define LOCK_REFRESH 30
 
-/* bits #0-4 in revision.h */
+/* bits #0-6 in revision.h */
 
-#define LOCAL    (1u << 5)
-#define REMOTE   (1u << 6)
-#define FETCHING (1u << 7)
-#define PUSHING  (1u << 8)
+#define LOCAL    (1u << 7)
+#define REMOTE   (1u << 8)
+#define FETCHING (1u << 9)
+#define PUSHING  (1u << 10)
 
 /* We allow "recursive" symbolic refs. Only within reason, though */
 #define MAXDEPTH 5