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/routing/basic/main.go

@@ -186,7 +186,7 @@ func main() {
 	//  http://v1.localhost:8080/api/users
 	//  http://v1.localhost:8080/api/users/42
 	//  http://anything.localhost:8080
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }
 
 func adminMiddleware(ctx iris.Context) {

_examples/routing/conditional-chain/main.go

@@ -52,5 +52,5 @@ func main() {
 
 	// http://localhost:8080/api/v1/users
 	// http://localhost:8080/api/v1/users?admin=true
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/routing/custom-context/method-overriding/main.go

@@ -78,7 +78,7 @@ func main() {
 		ctx.View("hi.html")
 	})
 
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }
 
 // should always print "($PATH) Handler is executing from 'MyContext'"

_examples/routing/custom-context/new-implementation/main.go

@@ -99,5 +99,5 @@ func main() {
 	// GET: http://localhost:8080
 	// POST: http://localhost:8080/set
 	// GET: http://localhost:8080/get
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/routing/custom-high-level-router/main.go

@@ -98,5 +98,5 @@ func main() {
 	myCustomRouter := new(customRouter)
 	app.BuildRouter(app.ContextPool, myCustomRouter, app.APIBuilder, true)
 
-	app.Run(iris.Addr(":8080"), iris.WithoutServerError(iris.ErrServerClosed))
+	app.Listen(":8080", iris.WithoutServerError(iris.ErrServerClosed))
 }

_examples/routing/custom-wrapper/main.go

@@ -61,7 +61,7 @@ func main() {
 	// http://localhost:8080/css/main.css
 	// http://localhost:8080/profile/anyusername
 	// http://localhost:8080/other/random
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 
 	// Note: In this example we just saw one use case,
 	// you may want to .WrapRouter or .Downgrade in order to bypass the iris' default router, i.e:

_examples/routing/dynamic-path/main.go

@@ -289,5 +289,5 @@ func main() {
 	// should differ e.g.
 	// /path/{name:string}
 	// /path/{id:uint}
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/routing/dynamic-path/root-wildcard/main.go

@@ -38,7 +38,7 @@ func main() {
 	// this will handle only GET "/other2/static"
 	app.Get("/other2/static2", staticPathOther2)
 
-	app.Run(iris.Addr(":8080"), iris.WithoutServerError(iris.ErrServerClosed))
+	app.Listen(":8080", iris.WithoutServerError(iris.ErrServerClosed))
 }
 
 func h(ctx iris.Context) {

_examples/routing/http-errors/main.go

@@ -38,7 +38,7 @@ func main() {
 	// http://localhost:8080/my500
 	// http://localhost:8080/u/gerasimos
 	// http://localhost:8080/product-problem
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }
 
 func newProductProblem(productName, detail string) iris.Problem {

_examples/routing/macros/main.go

@@ -72,5 +72,5 @@ func main() {
 		ctx.Writef("myparam's value (a trailing path parameter type) is: %#v\n", myparam)
 	})
 
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/routing/main.go

@@ -177,5 +177,5 @@ func main() {
 		// FIRE NOT FOUND
 		http://localhost:8080/coudlntfound
 	*/
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/routing/not-found-suggests/main.go

@@ -15,7 +15,7 @@ func main() {
 	app.Get("/newspaper", handler)
 	app.Get("/user/{id}", handler)
 
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }
 
 func notFound(ctx iris.Context) {

_examples/routing/overview/main.go

@@ -128,7 +128,7 @@ func main() {
 	// GET: http://admin.localhost:8080
 	// GET: http://admin.localhost:8080/settings
 	// GET: http://any_thing_here.localhost:8080
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }
 
 func info(ctx iris.Context) {

_examples/routing/reverse/main.go

@@ -35,5 +35,5 @@ func main() {
 	//
 	// See view/template_html_4 example for more reverse routing examples
 	// using the reverse router component and the {{url}} and {{urlpath}} template functions.
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/routing/route-state/main.go

@@ -41,5 +41,5 @@ func main() {
 		ctx.Exec("GET", "/invisible/iris")
 	})
 
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }

_examples/routing/writing-a-middleware/globally/main.go

@@ -29,7 +29,7 @@ func main() {
 	app.UseGlobal(before)
 	app.DoneGlobal(after)
 
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }
 
 func before(ctx iris.Context) {

_examples/routing/writing-a-middleware/per-route/main.go

@@ -38,7 +38,7 @@ are applied here as well.`)
 		ctx.Next() // call the done handlers.
 	})
 
-	app.Run(iris.Addr(":8080"))
+	app.Listen(":8080")
 }
 
 func before(ctx iris.Context) {