LogDog: Add prefix registration endpoint.

appengine/logdog/coordinator/endpoints/registration/registerPrefix.go

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package registration
+
+import (
+        "github.com/luci/luci-go/common/api/logdog_coordinator/registration/v1"
+        "github.com/luci/luci-go/common/grpcutil"
+        "golang.org/x/net/context"
+)
+
+func (s *server) RegisterPrefix(c context.Context, req *logdog.RegisterPrefixRequest) (*logdog.RegisterPrefixResponse, error) {
+        // TODO(dnj): Actually implement this endpoint.
+        return nil, grpcutil.Unimplemented
+}