Use Go1.11 module (#5743)

* Migrate to go modules

* make vendor

* Update mvdan.cc/xurls

* make vendor

* Update code.gitea.io/git

* make fmt-check

* Update github.com/go-sql-driver/mysql

* make vendor

vendor/mvdan.cc/xurls/v2/README.md

@@ -0,0 +1,28 @@
+# xurls
+
+[![GoDoc](https://godoc.org/mvdan.cc/xurls?status.svg)](https://godoc.org/mvdan.cc/xurls)
+[![Travis](https://travis-ci.org/mvdan/xurls.svg?branch=master)](https://travis-ci.org/mvdan/xurls)
+
+Extract urls from text using regular expressions. Requires Go 1.10.3 or later.
+
+```go
+import "mvdan.cc/xurls/v2"
+
+func main() {
+	xurls.Relaxed().FindString("Do gophers live in golang.org?")
+	// "golang.org"
+	xurls.Strict().FindAllString("foo.com is http://foo.com/.", -1)
+	// []string{"http://foo.com/"}
+}
+```
+
+Note that the funcs compile regexes, so avoid calling them repeatedly.
+
+#### cmd/xurls
+
+	go get -u mvdan.cc/xurls/v2/cmd/xurls
+
+```shell
+$ echo "Do gophers live in http://golang.org?" | xurls
+http://golang.org
+```