merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/t/t3008-ls-files-lazy-init-name-hash.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+test_description='Test the lazy init name hash with various folder structures'
+
+. ./test-lib.sh
+
+if test 1 -eq $($GIT_BUILD_DIR/t/helper/test-tool online-cpus)
+then
+	skip_all='skipping lazy-init tests, single cpu'
+	test_done
+fi
+
+LAZY_THREAD_COST=2000
+
+test_expect_success 'no buffer overflow in lazy_init_name_hash' '
+	(
+	    test_seq $LAZY_THREAD_COST | sed "s/^/a_/" &&
+	    echo b/b/b &&
+	    test_seq $LAZY_THREAD_COST | sed "s/^/c_/" &&
+	    test_seq 50 | sed "s/^/d_/" | tr "\n" "/" && echo d
+	) |
+	sed "s/^/100644 $EMPTY_BLOB	/" |
+	git update-index --index-info &&
+	test-tool lazy-init-name-hash -m
+'
+
+test_done