Add localforward example

_examples/ssh-localforward/localforward.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"io"
+	"log"
+
+	"github.com/gliderlabs/ssh"
+)
+
+func main() {
+	log.Println("starting ssh server on port 2222...")
+
+	server := ssh.Server{
+		LocalPortForwardingCallback: ssh.LocalPortForwardingCallback(func(ctx ssh.Context, dhost string, dport uint32) bool {
+			log.Println("Accepted forward", dhost, dport)
+			return true
+		}),
+		Addr: ":2222",
+		Handler: ssh.Handler(func(s ssh.Session) {
+			io.WriteString(s, "Local forwarding available...\n")
+			select {}
+		}),
+		ChannelHandlers: map[string]ssh.ChannelHandler{
+			"session":      ssh.DefaultSessionHandler,
+			"direct-tcpip": ssh.DirectTCPIPHandler,
+		},
+	}
+
+	log.Fatal(server.ListenAndServe())
+}