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/github.com/mrjones/oauth/pre-commit.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# ln -s $PWD/pre-commit.sh .git/hooks/pre-commit
+go test *.go
+RESULT=$?
+if [[ $RESULT != 0 ]]; then
+    echo "REJECTING COMMIT (test failed with status: $RESULT)"
+    exit 1;
+fi
+
+go fmt *.go
+for e in $(ls examples); do 
+    go build examples/$e/*.go
+    RESULT=$?
+    if [[ $RESULT != 0 ]]; then
+        echo "REJECTING COMMIT (Examples failed to compile)"
+        exit $RESULT;
+    fi
+    go fmt examples/$e/*.go
+done
+
+exit 0