Add badges, fix spello, and test unresolvable dials (#68)

Add badges, fix spello, and test unresolvable dials

README.md

 # go-reuseport
 
-[![travisbadge](https://travis-ci.org/libp2p/go-reuseport.svg)](https://travis-ci.org/libp2p/go-reuseport)
+[![](https://img.shields.io/badge/made%20by-Protocol%20Labs-blue.svg?style=flat-square)](https://protocol.ai)
+[![](https://img.shields.io/badge/project-libp2p-blue.svg?style=flat-square)](https://libp2p.io/)
+[![](https://img.shields.io/badge/freenode-%23libp2p-blue.svg?style=flat-square)](https://webchat.freenode.net/?channels=%23libp2p)
+[![codecov](https://codecov.io/gh/libp2p/go-reuseport/branch/master/graph/badge.svg)](https://codecov.io/gh/libp2p/go-reuseport)
+[![Travis CI](https://travis-ci.org/libp2p/go-reuseport.svg?branch=master)](https://travis-ci.org/libp2p/go-reuseport)
 
 **NOTE:** This package REQUIRES go >= 1.11.
 

interface.go

@@ -49,7 +49,7 @@ func ListenPacket(network, address string) (net.PacketConn, error) {
 }
 
 // Dial dials the given network and address. see net.Dialer.Dial
-// Returns a net.Conn created from a file discriptor for a socket
+// Returns a net.Conn created from a file descriptor for a socket
 // with SO_REUSEPORT and SO_REUSEADDR option set.
 func Dial(network, laddr, raddr string) (net.Conn, error) {
 	nla, err := ResolveAddr(network, laddr)

old_go_warning.go

-// +build !go1.11
-
-"go-reuseport requires go >= 1.11"
-
-;
-

reuse_test.go

@@ -6,6 +6,9 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/pkg/errors"
+	"github.com/stretchr/testify/assert"
+
 	"github.com/stretchr/testify/require"
 )
 
@@ -43,3 +46,10 @@ func TestListenPacketWildcardAddress(t *testing.T) {
 	require.NoError(t, err)
 	pc.Close()
 }
+
+func TestErrorWhenDialUnresolvable(t *testing.T) {
+	_, err := Dial("asd", "127.0.0.1:1234", "127.0.0.1:1234")
+	assert.IsType(t, net.UnknownNetworkError(""), errors.Cause(err))
+	_, err = Dial("tcp", "a.b.c.d:1234", "a.b.c.d:1235")
+	assert.Error(t, err)
+}