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/t9350-fast-export.sh

@@ -53,33 +53,6 @@ test_expect_success 'fast-export | fast-import' '
 
 '
 
-test_expect_success 'fast-export ^muss^{commit} muss' '
-	git fast-export --tag-of-filtered-object=rewrite ^muss^{commit} muss >actual &&
-	cat >expected <<-EOF &&
-	tag muss
-	from $(git rev-parse --verify muss^{commit})
-	$(git cat-file tag muss | grep tagger)
-	data 9
-	valentin
-
-	EOF
-	test_cmp expected actual
-'
-
-test_expect_success 'fast-export --mark-tags ^muss^{commit} muss' '
-	git fast-export --mark-tags --tag-of-filtered-object=rewrite ^muss^{commit} muss >actual &&
-	cat >expected <<-EOF &&
-	tag muss
-	mark :1
-	from $(git rev-parse --verify muss^{commit})
-	$(git cat-file tag muss | grep tagger)
-	data 9
-	valentin
-
-	EOF
-	test_cmp expected actual
-'
-
 test_expect_success 'fast-export master~2..master' '
 
 	git fast-export master~2..master >actual &&
@@ -540,41 +513,10 @@ test_expect_success 'tree_tag'        '
 '
 
 # NEEDSWORK: not just check return status, but validate the output
-# Note that these tests DO NOTHING other than print a warning that
-# they are omitting the one tag we asked them to export (because the
-# tags resolve to a tree).  They exist just to make sure we do not
-# abort but instead just warn.
 test_expect_success 'tree_tag-obj'    'git fast-export tree_tag-obj'
 test_expect_success 'tag-obj_tag'     'git fast-export tag-obj_tag'
 test_expect_success 'tag-obj_tag-obj' 'git fast-export tag-obj_tag-obj'
 
-test_expect_success 'handling tags of blobs' '
-	git tag -a -m "Tag of a blob" blobtag $(git rev-parse master:file) &&
-	git fast-export blobtag >actual &&
-	cat >expect <<-EOF &&
-	blob
-	mark :1
-	data 9
-	die Luft
-
-	tag blobtag
-	from :1
-	tagger $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
-	data 14
-	Tag of a blob
-
-	EOF
-	test_cmp expect actual
-'
-
-test_expect_success 'handling nested tags' '
-	git tag -a -m "This is a nested tag" nested muss &&
-	git fast-export --mark-tags nested >output &&
-	grep "^from $ZERO_OID$" output &&
-	grep "^tag nested$" output >tag_lines &&
-	test_line_count = 2 tag_lines
-'
-
 test_expect_success 'directory becomes symlink'        '
 	git init dirtosymlink &&
 	git init result &&
@@ -600,10 +542,9 @@ test_expect_success 'directory becomes symlink'        '
 
 test_expect_success 'fast-export quotes pathnames' '
 	git init crazy-paths &&
-	test_config -C crazy-paths core.protectNTFS false &&
 	(cd crazy-paths &&
 	 blob=$(echo foo | git hash-object -w --stdin) &&
-	 git -c core.protectNTFS=false update-index --add \
+	 git update-index --add \
 		--cacheinfo 100644 $blob "$(printf "path with\\nnewline")" \
 		--cacheinfo 100644 $blob "path with \"quote\"" \
 		--cacheinfo 100644 $blob "path with \\backslash" \
@@ -626,15 +567,17 @@ test_expect_success 'fast-export quotes pathnames' '
 '
 
 test_expect_success 'test bidirectionality' '
+	>marks-cur &&
+	>marks-new &&
 	git init marks-test &&
-	git fast-export --export-marks=marks-cur --import-marks-if-exists=marks-cur --branches | \
-	git --git-dir=marks-test/.git fast-import --export-marks=marks-new --import-marks-if-exists=marks-new &&
+	git fast-export --export-marks=marks-cur --import-marks=marks-cur --branches | \
+	git --git-dir=marks-test/.git fast-import --export-marks=marks-new --import-marks=marks-new &&
 	(cd marks-test &&
 	git reset --hard &&
 	echo Wohlauf > file &&
 	git commit -a -m "back in time") &&
-	git --git-dir=marks-test/.git fast-export --export-marks=marks-new --import-marks-if-exists=marks-new --branches | \
-	git fast-import --export-marks=marks-cur --import-marks-if-exists=marks-cur
+	git --git-dir=marks-test/.git fast-export --export-marks=marks-new --import-marks=marks-new --branches | \
+	git fast-import --export-marks=marks-cur --import-marks=marks-cur
 '
 
 cat > expected << EOF