Add glide.yaml and vendor deps

vendor/github.com/docker/go-connections/sockets/inmem_socket_test.go

@@ -0,0 +1,39 @@
+package sockets
+
+import "testing"
+
+func TestInmemSocket(t *testing.T) {
+	l := NewInmemSocket("test", 0)
+	defer l.Close()
+	go func() {
+		for {
+			conn, err := l.Accept()
+			if err != nil {
+				return
+			}
+			conn.Write([]byte("hello"))
+			conn.Close()
+		}
+	}()
+
+	conn, err := l.Dial("test", "test")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	buf := make([]byte, 5)
+	_, err = conn.Read(buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if string(buf) != "hello" {
+		t.Fatalf("expected `hello`, got %s", string(buf))
+	}
+
+	l.Close()
+	conn, err = l.Dial("test", "test")
+	if err != errClosed {
+		t.Fatalf("expected `errClosed` error, got %v", err)
+	}
+}