[PATCH] Make O(n) algorithm the default implementation of --bisect

This patch makes the O(n) the default implementation of the git-rev-list
--bisect switch.

The original O(n^2) algorithm is still available as --bisect-orig.

It is left around to provide a quick and simple way to verify the
accuracy of the O(n) algorithm.

A subsequent patch is supplied to remove support for --bisect-orig
completely.

Signed-off: Jon Seymour [off-list ref]
---
Linus: you may choose to defer application of this patch if you are
not confident that the O(n) algorithm is good.
---

 rev-list.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

342b91442a303b222f1601ef34ef37fffe5a9d57

diff --git a/rev-list.c b/rev-list.c
--- a/rev-list.c
+++ b/rev-list.c

@@ -16,6 +16,7 @@ static const char rev_list_usage[] =
 		      "  --min-age=epoch\n"
 		      "  --header\n"
 		      "  --pretty\n"
+                      "  --bisect\n"
 		      "  --merge-order [ --show-breaks ]";
 
 static int bisect_list = 0;

@@ -365,11 +366,11 @@ int main(int argc, char **argv)
 			show_parents = 1;
 			continue;
 		}
-		if (!strcmp(arg, "--bisect-by-cut")) {
+		if (!strcmp(arg, "--bisect")) {
 			bisect_by_cut_option = 1;
 			continue;
 		}
-		if (!strcmp(arg, "--bisect")) {
+		if (!strcmp(arg, "--bisect-orig")) {
 			bisect_list = 1;
 			continue;
 		}
------------