LogDog: Implement RegisterPrefix RPC.

common/proto/logdog/svcconfig/config.proto

 // Copyright 2015 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.
 
 syntax = "proto3";
 
 package svcconfig;
 
 import "transport.proto";
 import "storage.proto";
@@ skipping 23 matching lines @@
 
   // A list of origin URLs that are allowed to perform CORS RPC calls.
   repeated string rpc_allow_origins = 20;
 
   // The maximum amount of time after a prefix has been registered when log
   // streams may also be registered under that prefix.
   //
   // After the expiration period has passed, new log stream registration will
   // fail.
   //
-  // Project or stream configurations may override this by providing >= 0 values
-  // for prefix expiration. The smallest configured expiration will be applied.
+  // Project configurations or stream prefix regitrations may override this by
+  // providing >= 0 values for prefix expiration. The smallest configured
+  // expiration will be applied.
   google.protobuf.Duration prefix_expiration = 21;
 
   // The full path of the archival Pub/Sub topic.
   //
   // The Coordinator must have permission to publish to this topic.
   string archive_topic = 30;
 
   // The amount of time after an archive request has been dispatched before it
   // should be executed.
   //
@@ skipping 80 matching lines @@
   //     back.
   //
   // Enabling this option will consume roughly twice the archival space, as each
   // stream's data will be archived once as a series of log entries and once as
   // a binary file.
   //
   // Streams without an explicit binary file extension will default to ".bin" if
   // this is enabled.
   bool always_create_binary = 13;
 }