revert(3p/git): Revert merge of git upstream at v2.26.2

This causes cgit to serve error pages, which is undesirable.

This reverts commit 5229c9b232, reversing
changes made to f2b211131f.

third_party/git/t/t3406-rebase-message.sh

@@ -18,29 +18,32 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'rebase -m' '
-	git rebase -m master >actual &&
-	test_must_be_empty actual
+	git rebase -m master >report &&
+	>expect &&
+	sed -n -e "/^Already applied: /p" \
+		-e "/^Committed: /p" report >actual &&
+	test_cmp expect actual
 '
 
 test_expect_success 'rebase against master twice' '
-	git rebase --apply master >out &&
+	git rebase master >out &&
 	test_i18ngrep "Current branch topic is up to date" out
 '
 
 test_expect_success 'rebase against master twice with --force' '
-	git rebase --force-rebase --apply master >out &&
+	git rebase --force-rebase master >out &&
 	test_i18ngrep "Current branch topic is up to date, rebase forced" out
 '
 
 test_expect_success 'rebase against master twice from another branch' '
 	git checkout topic^ &&
-	git rebase --apply master topic >out &&
+	git rebase master topic >out &&
 	test_i18ngrep "Current branch topic is up to date" out
 '
 
 test_expect_success 'rebase fast-forward to master' '
 	git checkout topic^ &&
-	git rebase --apply topic >out &&
+	git rebase topic >out &&
 	test_i18ngrep "Fast-forwarded HEAD to topic" out
 '
 
@@ -89,7 +92,7 @@ test_expect_success 'GIT_REFLOG_ACTION' '
 	git checkout -b reflog-topic start &&
 	test_commit reflog-to-rebase &&
 
-	git rebase --apply reflog-onto &&
+	git rebase reflog-onto &&
 	git log -g --format=%gs -3 >actual &&
 	cat >expect <<-\EOF &&
 	rebase finished: returning to refs/heads/reflog-topic
@@ -99,7 +102,7 @@ test_expect_success 'GIT_REFLOG_ACTION' '
 	test_cmp expect actual &&
 
 	git checkout -b reflog-prefix reflog-to-rebase &&
-	GIT_REFLOG_ACTION=change-the-reflog git rebase --apply reflog-onto &&
+	GIT_REFLOG_ACTION=change-the-reflog git rebase reflog-onto &&
 	git log -g --format=%gs -3 >actual &&
 	cat >expect <<-\EOF &&
 	rebase finished: returning to refs/heads/reflog-prefix