Use git log name-status in get last commit (#16059)

* Improve get last commit using git log --name-status

git log --name-status -c provides information about the diff between a
commit and its parents. Using this and adjusting the algorithm to use
the first change to a path allows for a much faster generation of commit
info.

There is a subtle change in the results generated but this will cause
the results to more closely match those from elsewhere.

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lauris BH <lauris@nix.lv>

vendor/github.com/djherbis/nio/v3/README.md

@@ -0,0 +1,65 @@
+nio 
+==========
+
+[![GoDoc](https://godoc.org/github.com/djherbis/nio?status.svg)](https://godoc.org/github.com/djherbis/nio) 
+[![Release](https://img.shields.io/github/release/djherbis/nio.svg)](https://github.com/djherbis/nio/releases/latest)
+[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg)](LICENSE.txt)
+[![Build Status](https://travis-ci.org/djherbis/nio.svg)](https://travis-ci.org/djherbis/nio)
+[![Coverage Status](https://coveralls.io/repos/djherbis/nio/badge.svg?branch=master)](https://coveralls.io/r/djherbis/nio?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/djherbis/nio)](https://goreportcard.com/report/github.com/djherbis/nio)
+
+Usage
+-----
+
+The Buffer interface:
+
+```go
+type Buffer interface {
+	Len() int64
+	Cap() int64
+	io.ReadWriter
+}
+
+```
+
+nio's Copy method concurrently copies from an io.Reader to a supplied nio.Buffer, 
+then from the nio.Buffer to an io.Writer. This way, blocking writes don't slow the io.Reader.
+
+```go
+import (
+  "github.com/djherbis/buffer"
+  "github.com/djherbis/nio"
+)
+
+buf := buffer.New(32*1024) // 32KB In memory Buffer
+nio.Copy(w, r, buf) // Reads and Writes concurrently, buffering using buf.
+```
+
+nio's Pipe method is a buffered version of io.Pipe
+The writer return once its data has been written to the Buffer.
+The reader returns with data off the Buffer.
+
+```go
+import (
+  "gopkg.in/djherbis/buffer.v1"
+  "gopkg.in/djherbis/nio.v2"
+)
+
+buf := buffer.New(32*1024) // 32KB In memory Buffer
+r, w := nio.Pipe(buf)
+```
+
+Installation
+------------
+```sh
+go get gopkg.in/djherbis/nio.v2
+```
+
+For some pre-built buffers grab:
+```sh
+go get gopkg.in/djherbis/buffer.v1
+```
+
+Mentions
+------------
+[GopherCon 2017: Peter Bourgon - Evolutionary Optimization with Go](https://www.youtube.com/watch?v=ha8gdZ27wMo&start=2077&end=2140)