LogDog: Add prefix registration endpoint.

appengine/cmd/logdog_coordinator/register/main.go

Index: appengine/cmd/logdog_coordinator/register/main.go
diff --git a/appengine/cmd/logdog_coordinator/services/main.go b/appengine/cmd/logdog_coordinator/register/main.go
similarity index 86%
copy from appengine/cmd/logdog_coordinator/services/main.go
copy to appengine/cmd/logdog_coordinator/register/main.go
index 53841e9fc7c43550a9a14c42cc68ec2434279f40..9d82d38476ce8dc7833639da0ca7197eb4983b25 100644
--- a/appengine/cmd/logdog_coordinator/services/main.go
+++ b/appengine/cmd/logdog_coordinator/register/main.go
@@ -11,8 +11,8 @@ import (
 	"github.com/luci/luci-go/appengine/gaemiddleware"
 	"github.com/luci/luci-go/appengine/logdog/coordinator"
 	"github.com/luci/luci-go/appengine/logdog/coordinator/config"
-	"github.com/luci/luci-go/appengine/logdog/coordinator/endpoints/services"
-	servicesPb "github.com/luci/luci-go/common/api/logdog_coordinator/services/v1"
+	"github.com/luci/luci-go/appengine/logdog/coordinator/endpoints/registration"
+	registrationPb "github.com/luci/luci-go/common/api/logdog_coordinator/registration/v1"
 	"github.com/luci/luci-go/server/middleware"
 	"github.com/luci/luci-go/server/prpc"
 
@@ -34,7 +34,7 @@ func init() {
 
 	// Setup Cloud Endpoints.
 	svr := prpc.Server{}
-	servicesPb.RegisterServicesServer(&svr, services.New())
+	registrationPb.RegisterRegistrationServer(&svr, registration.New())
 
 	// Standard HTTP endpoints.
 	svr.InstallHandlers(router, base)