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/strk.kbt.io/projects/go/libravatar/.editorconfig

@@ -0,0 +1,8 @@
+# http://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = tab

vendor/strk.kbt.io/projects/go/libravatar/README.md

@@ -0,0 +1,25 @@
+Simple [golang](https://www.golang.org) library for serving
+[federated avatars](https://www.libravatar.org)
+
+# Use
+
+```sh
+go get strk.kbt.io/projects/go/libravatar
+cd $GOPATH/src/strk.kbt.io/projects/go/libravatar
+go doc
+```
+
+# Contribute
+
+A clone of the code repository would be downloaded by `go get`.
+You can send patches or pull requests to strk@kbt.io.
+
+If you need a place to publish your contribution branches,
+you could start from a fork of the gitlab mirror:
+https://gitlab.com/strk/go-libravatar
+  
+# Contacts
+
+ * Project homepage: http://strk.kbt.io/projects/go/libravatar
+ * Maintainer: Sandro Santilli <strk@kbt.io>
+