Add 'ours' merge strategy.

This adds the coolest merge strategy ever, "ours".  It can take
arbitrary number of foreign heads and merge them into the
current branch, with the resulting tree always taken from our
branch head, hence its name.

What this means is that you can declare that the current branch
supersedes the development histories of other branches using
this merge strategy.

Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/.gitignore b/.gitignore
index 927c89c..3edf6b4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,6 +50,7 @@
 git-merge-index
 git-merge-octopus
 git-merge-one-file
+git-merge-ours
 git-merge-recursive
 git-merge-resolve
 git-merge-stupid
diff --git a/Makefile b/Makefile
index be6101a..6c01dc2 100644
--- a/Makefile
+++ b/Makefile
@@ -89,7 +89,7 @@
 	git-tag.sh git-verify-tag.sh git-whatchanged.sh git.sh \
 	git-applymbox.sh git-applypatch.sh git-am.sh \
 	git-merge.sh git-merge-stupid.sh git-merge-octopus.sh \
-	git-merge-resolve.sh git-grep.sh
+	git-merge-resolve.sh git-merge-ours.sh git-grep.sh
 
 SCRIPT_PERL = \
 	git-archimport.perl git-cvsimport.perl git-relink.perl \
diff --git a/git-merge-ours.sh b/git-merge-ours.sh
new file mode 100755
index 0000000..a64704f
--- /dev/null
+++ b/git-merge-ours.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+#
+# Copyright (c) 2005 Junio C Hamano
+#
+# Pretend we resolved the heads, but declare our tree trumps everybody else.
+#
+exit 0
diff --git a/git-merge.sh b/git-merge.sh
index dd104db..b810fce 100755
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -14,7 +14,7 @@
 
 # all_strategies='resolve recursive stupid octopus'
 
-all_strategies='recursive octopus resolve stupid'
+all_strategies='recursive octopus resolve stupid ours'
 default_strategies='resolve octopus'
 use_strategies=