Update iris.AutoTLS example, read description.

Iris devs should declare all the information now, there is no option to "leave something out" anymore, it's for your own good. Version is not changed yet, giving you time to see that changelog and do the necessary changes to your codebase, it will written to HISTORY.md too of course.

Before:
app.Run(iris.AutoTLS(":443"))

Now:
app.Run(iris.AutoTLS(":443", "example.com", "mail@example.com")

Commit Change: f7b655f145 [formerly f5314a8c1f8303d7216481d05129eb8a62766e14]

Happy weekend!


Former-commit-id: bf974dc486d05ff008c9ed13aaf96e716b1e55c6

_examples/http-listening/listen-letsencrypt/main.go

@@ -21,8 +21,8 @@ func main() {
 		ctx.Redirect("/test2")
 	})
 
-	// NOTE: This may not work on local addresses like this,
-	// use it on a real domain, because
-	// it uses the 	"golang.org/x/crypto/acme/autocert" package.
-	app.Run(iris.AutoTLS("localhost:443"))
+	// NOTE: This will not work on domains like this,
+	// use real whitelisted domain(or domains split by whitespaces)
+	// and a non-public e-mail instead.
+	app.Run(iris.AutoTLS(":443", "example.com", "mail@example.com"))
 }