Update libkv dependency

vendor/google.golang.org/grpc/stats/stats.go

@@ -1,33 +1,18 @@
 /*
  *
- * Copyright 2016, Google Inc.
- * All rights reserved.
+ * Copyright 2016 gRPC authors.
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  *
  */
 
@@ -49,7 +34,7 @@ type RPCStats interface {
 }
 
 // Begin contains stats when an RPC begins.
-// FailFast are only valid if Client is true.
+// FailFast is only valid if this Begin is from client side.
 type Begin struct {
 	// Client is true if this Begin is from client side.
 	Client bool
@@ -59,7 +44,7 @@ type Begin struct {
 	FailFast bool
 }
 
-// IsClient indicates if this is from client side.
+// IsClient indicates if the stats information is from client side.
 func (s *Begin) IsClient() bool { return s.Client }
 
 func (s *Begin) isRPCStats() {}
@@ -80,19 +65,19 @@ type InPayload struct {
 	RecvTime time.Time
 }
 
-// IsClient indicates if this is from client side.
+// IsClient indicates if the stats information is from client side.
 func (s *InPayload) IsClient() bool { return s.Client }
 
 func (s *InPayload) isRPCStats() {}
 
 // InHeader contains stats when a header is received.
-// FullMethod, addresses and Compression are only valid if Client is false.
 type InHeader struct {
 	// Client is true if this InHeader is from client side.
 	Client bool
 	// WireLength is the wire length of header.
 	WireLength int
 
+	// The following fields are valid only if Client is false.
 	// FullMethod is the full RPC method string, i.e., /package.service/method.
 	FullMethod string
 	// RemoteAddr is the remote address of the corresponding connection.
@@ -103,7 +88,7 @@ type InHeader struct {
 	Compression string
 }
 
-// IsClient indicates if this is from client side.
+// IsClient indicates if the stats information is from client side.
 func (s *InHeader) IsClient() bool { return s.Client }
 
 func (s *InHeader) isRPCStats() {}
@@ -116,7 +101,7 @@ type InTrailer struct {
 	WireLength int
 }
 
-// IsClient indicates if this is from client side.
+// IsClient indicates if the stats information is from client side.
 func (s *InTrailer) IsClient() bool { return s.Client }
 
 func (s *InTrailer) isRPCStats() {}
@@ -137,19 +122,19 @@ type OutPayload struct {
 	SentTime time.Time
 }
 
-// IsClient indicates if this is from client side.
+// IsClient indicates if this stats information is from client side.
 func (s *OutPayload) IsClient() bool { return s.Client }
 
 func (s *OutPayload) isRPCStats() {}
 
 // OutHeader contains stats when a header is sent.
-// FullMethod, addresses and Compression are only valid if Client is true.
 type OutHeader struct {
 	// Client is true if this OutHeader is from client side.
 	Client bool
 	// WireLength is the wire length of header.
 	WireLength int
 
+	// The following fields are valid only if Client is true.
 	// FullMethod is the full RPC method string, i.e., /package.service/method.
 	FullMethod string
 	// RemoteAddr is the remote address of the corresponding connection.
@@ -160,7 +145,7 @@ type OutHeader struct {
 	Compression string
 }
 
-// IsClient indicates if this is from client side.
+// IsClient indicates if this stats information is from client side.
 func (s *OutHeader) IsClient() bool { return s.Client }
 
 func (s *OutHeader) isRPCStats() {}
@@ -173,7 +158,7 @@ type OutTrailer struct {
 	WireLength int
 }
 
-// IsClient indicates if this is from client side.
+// IsClient indicates if this stats information is from client side.
 func (s *OutTrailer) IsClient() bool { return s.Client }
 
 func (s *OutTrailer) isRPCStats() {}
@@ -184,7 +169,7 @@ type End struct {
 	Client bool
 	// EndTime is the time when the RPC ends.
 	EndTime time.Time
-	// Error is the error just happened. Its type is gRPC error.
+	// Error is the error just happened.  It implements status.Status if non-nil.
 	Error error
 }