Put back panic for go1.0.3 compatibility

container.go

@@ -606,6 +606,7 @@ func (container *Container) waitLxc() error {
 		}
 		time.Sleep(500 * time.Millisecond)
 	}
+	panic("Unreachable")
 }
 
 func (container *Container) monitor() {
@@ -794,6 +795,8 @@ func (container *Container) WaitTimeout(timeout time.Duration) error {
 	case <-done:
 		return nil
 	}
+
+	panic("Unreachable")
 }
 
 func (container *Container) EnsureMounted() error {

network.go

@@ -257,6 +257,7 @@ func proxy(listener net.Listener, proto, address string) error {
 		utils.Debugf("Connected to backend, splicing")
 		splice(src, dst)
 	}
+	panic("Unreachable")
 }
 
 func halfSplice(dst, src net.Conn) error {