Fix comment for QUIC handshake message tag COPT.

net/quic/crypto/crypto_protocol.h

 // Copyright (c) 2012 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.
 
 #ifndef NET_QUIC_CRYPTO_CRYPTO_PROTOCOL_H_
 #define NET_QUIC_CRYPTO_CRYPTO_PROTOCOL_H_
 
 #include <string>
 
 #include "net/base/net_export.h"
@@ skipping 33 matching lines @@
 const QuicTag kAESG = TAG('A', 'E', 'S', 'G');   // AES128 + GCM-12
 const QuicTag kCC12 = TAG('C', 'C', '1', '2');   // ChaCha20 + Poly1305
 
 // Socket receive buffer
 const QuicTag kSRBF = TAG('S', 'R', 'B', 'F');   // Socket receive buffer
 
 // Congestion control feedback types
 const QuicTag kQBIC = TAG('Q', 'B', 'I', 'C');   // TCP cubic
 const QuicTag kTSTP = TAG('T', 'S', 'T', 'P');   // Timestamp
 
-// Congestion control options
+// Connection options (COPT) values
 const QuicTag kTBBR = TAG('T', 'B', 'B', 'R');   // Reduced Buffer Bloat TCP
 const QuicTag kRENO = TAG('R', 'E', 'N', 'O');   // Reno Congestion Control
 const QuicTag kIW10 = TAG('I', 'W', '1', '0');   // Force ICWND to 10
 const QuicTag kPACE = TAG('P', 'A', 'C', 'E');   // Paced TCP cubic
 
 // Loss detection algorithm types
 const QuicTag kNACK = TAG('N', 'A', 'C', 'K');   // TCP style nack counting
 const QuicTag kTIME = TAG('T', 'I', 'M', 'E');   // Time based
 
 // FEC options
 const QuicTag kFHDR = TAG('F', 'H', 'D', 'R');   // FEC protect headers
 
 // Proof types (i.e. certificate types)
 // NOTE: although it would be silly to do so, specifying both kX509 and kX59R
 // is allowed and is equivalent to specifying only kX509.
 const QuicTag kX509 = TAG('X', '5', '0', '9');   // X.509 certificate, all key
                                                  // types
 const QuicTag kX59R = TAG('X', '5', '9', 'R');   // X.509 certificate, RSA keys
                                                  // only
 const QuicTag kCHID = TAG('C', 'H', 'I', 'D');   // Channel ID.
 
 // Client hello tags
 const QuicTag kVER  = TAG('V', 'E', 'R', '\0');  // Version (new)
 const QuicTag kNONC = TAG('N', 'O', 'N', 'C');   // The client's nonce
 const QuicTag kKEXS = TAG('K', 'E', 'X', 'S');   // Key exchange methods
 const QuicTag kAEAD = TAG('A', 'E', 'A', 'D');   // Authenticated
                                                  // encryption algorithms
 const QuicTag kCGST = TAG('C', 'G', 'S', 'T');   // Congestion control
                                                  // feedback types
-const QuicTag kCOPT = TAG('C', 'O', 'P', 'T');   // Congestion control options
+const QuicTag kCOPT = TAG('C', 'O', 'P', 'T');   // Connection options
 // kLOSS was 'L', 'O', 'S', 'S', but was changed from a tag vector to a tag.
 const QuicTag kLOSS = TAG('L', 'O', 'S', 'A');   // Loss detection algorithms
 const QuicTag kICSL = TAG('I', 'C', 'S', 'L');   // Idle connection state
                                                  // lifetime
 const QuicTag kKATO = TAG('K', 'A', 'T', 'O');   // Keepalive timeout
 const QuicTag kMSPC = TAG('M', 'S', 'P', 'C');   // Max streams per connection.
 const QuicTag kIRTT = TAG('I', 'R', 'T', 'T');   // Estimated initial RTT in us.
 const QuicTag kSWND = TAG('S', 'W', 'N', 'D');   // Server's Initial congestion
                                                  // window.
 const QuicTag kSNI  = TAG('S', 'N', 'I', '\0');  // Server name
@@ skipping 72 matching lines @@
 // amplification factor of any mirror DoS attack.
 //
 // A client may pad an inchoate client hello to a size larger than
 // kClientHelloMinimumSize to make it more likely to receive a complete
 // rejection message.
 const size_t kClientHelloMinimumSize = 1024;
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_CRYPTO_PROTOCOL_H_