Separate API router from server.

Implement basic interfaces to write custom routers that can be plugged
to the server. Remove server coupling with the daemon.

Signed-off-by: David Calavera <david.calavera@gmail.com>
Upstream-commit: da982cf5511814b6897244ecaa9c016f8800340a
Component: engine

components/engine/api/server/server_windows.go

@@ -6,8 +6,6 @@ import (
 	"errors"
 	"net"
 	"net/http"
-
-	"github.com/docker/docker/daemon"
 )
 
 // NewServer sets up the required Server and does protocol specific checking.
@@ -32,7 +30,7 @@ func (s *Server) newServer(proto, addr string) ([]serverCloser, error) {
 		res = append(res, &HTTPServer{
 			&http.Server{
 				Addr:    addr,
-				Handler: s.router,
+				Handler: s.CreateMux(),
 			},
 			l,
 		})
@@ -41,18 +39,6 @@ func (s *Server) newServer(proto, addr string) ([]serverCloser, error) {
 
 }
 
-// AcceptConnections allows router to start listening for the incoming requests.
-func (s *Server) AcceptConnections(d *daemon.Daemon) {
-	s.daemon = d
-	s.registerSubRouter()
-	// close the lock so the listeners start accepting connections
-	select {
-	case <-s.start:
-	default:
-		close(s.start)
-	}
-}
-
 func allocateDaemonPort(addr string) error {
 	return nil
 }