examples: replace all app.Run(iris.Addr(...)) with app.Listen just for the shake of simplicity, both are doing the same exact thing as it's described on the http listening first example.

Former-commit-id: d20afb2e899aee658a8e0ed1693357798df93462

_examples/file-server/basic/main.go

@@ -48,5 +48,5 @@ func newApp() *iris.Application {
 
 func main() {
 	app := newApp()
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/file-server/embedding-files-into-app/main.go

@@ -32,5 +32,5 @@ func main() {
 	// http://localhost:8080/static/css/bootstrap.min.css
 	// http://localhost:8080/static/js/jquery-2.1.1.js
 	// http://localhost:8080/static/favicon.ico
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/file-server/embedding-gziped-files-into-app/main.go

@@ -32,5 +32,5 @@ func main() {
 	// http://localhost:8080/static/css/bootstrap.min.css
 	// http://localhost:8080/static/js/jquery-2.1.1.js
 	// http://localhost:8080/static/favicon.ico
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/file-server/favicon/main.go

@@ -20,5 +20,5 @@ func main() {
 		  so iris serves your favicon in that path too (you can change it).`)
 	}) // if favicon doesn't show to you, try to clear your browser's cache.
 
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/file-server/send-files/main.go

@@ -12,5 +12,5 @@ func main() {
 		ctx.SendFile(file, "c.zip")
 	})
 
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/file-server/single-page-application/basic/main.go

@@ -32,5 +32,5 @@ func main() {
 	// http://localhost:8080/index.html
 	// http://localhost:8080/app.js
 	// http://localhost:8080/css/main.css
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/file-server/single-page-application/embedded-single-page-application-with-other-routes/main.go

@@ -61,5 +61,5 @@ func main() {
 	// http://localhost:8080/.well-known/metrics
 	//
 	// Remember: we could use the root wildcard `app.Get("/{param:path}")` and serve the files manually as well.
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/file-server/single-page-application/embedded-single-page-application/main.go

@@ -37,5 +37,5 @@ func main() {
 	// http://localhost:8080/app.js
 	// http://localhost:8080/css/main.css
 	// http://localhost:8080/app2
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/file-server/subdomain/main.go

@@ -25,5 +25,5 @@ func newApp() *iris.Application {
 
 func main() {
 	app := newApp()
-	app.Run(iris.Addr(addr))
+	app.Listen(addr)
 }