rebase: support --verify

Interactive rebase allows the '--verify' option to be passed, but it will
be ignored. Implement proper support for the option for both interactive
and non-interactive rebase by making it override any previous
'--no-verify'.

Signed-off-by: Martin von Zweigbergk <martin.von.zweigbergk@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/git-rebase.sh b/git-rebase.sh
index 10a238a..7548f0c 100755
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -205,6 +205,9 @@
 	--no-verify)
 		OK_TO_SKIP_PRE_REBASE=yes
 		;;
+	--verify)
+		OK_TO_SKIP_PRE_REBASE=
+		;;
 	--continue)
 		test -d "$dotest" -o -d "$GIT_DIR"/rebase-apply ||
 			die "No rebase in progress?"