update vendor and use single static

vendor/github.com/gin-gonic/autotls/doc.go

@@ -0,0 +1,23 @@
+// Support Let's Encrypt for a Go server application.
+//
+// 	package main
+//
+// 	import (
+// 		"log"
+//
+// 		"github.com/gin-gonic/autotls"
+// 		"github.com/gin-gonic/gin"
+// 	)
+//
+// 	func main() {
+// 		r := gin.Default()
+//
+// 		// Ping handler
+// 		r.GET("/ping", func(c *gin.Context) {
+// 			c.String(200, "pong")
+// 		})
+//
+// 		log.Fatal(autotls.Run(r, "example1.com", "example2.com"))
+// 	}
+//
+package autotls