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

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

third_party/git/t/t7417-submodule-path-url.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+test_description='check handling of .gitmodule path with dash'
+. ./test-lib.sh
+
+test_expect_success 'create submodule with dash in path' '
+	git init upstream &&
+	git -C upstream commit --allow-empty -m base &&
+	git submodule add ./upstream sub &&
+	git mv sub ./-sub &&
+	git commit -m submodule
+'
+
+test_expect_success 'clone rejects unprotected dash' '
+	test_when_finished "rm -rf dst" &&
+	git clone --recurse-submodules . dst 2>err &&
+	test_i18ngrep ignoring err
+'
+
+test_expect_success 'fsck rejects unprotected dash' '
+	test_when_finished "rm -rf dst" &&
+	git init --bare dst &&
+	git -C dst config transfer.fsckObjects true &&
+	test_must_fail git push dst HEAD 2>err &&
+	grep gitmodulesPath err
+'
+
+test_done