Fix a few pieces of documentation

client/registration_protocol_win.h

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // 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
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 16 matching lines @@
 struct RegistrationRequest {
   //! \brief The PID of the client process.
   DWORD client_process_id;
   //! \brief The address, in the client process address space, of a CrashpadInfo
   //!     structure.
   crashpad::WinVMAddress crashpad_info_address;
 };
 #pragma pack(pop)
 
 #pragma pack(push, 1)
-//! \brief  A client registration response. See
-//!     https://msdn.microsoft.com/en-us/library/windows/desktop/aa384203 for
-//!     details on communicating handle values between 32-bit and 64-bit
-//!     processes.
+//! \brief  A client registration response.
+//!
+//! See <a
+//! href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa384203">Interprocess
+//! Communication Between 32-bit and 64-bit Applications</a> for details on
+//! communicating handle values between processes of varying bitness.
 struct RegistrationResponse {
   //! \brief An event `HANDLE`, valid in the client process, that should be
   //!     signaled to request a crash report. 64-bit clients should convert the
   //!     value to a `HANDLE` using sign-extension.
   uint32_t request_report_event;
   //! \brief An event `HANDLE`, valid in the client process, that will be
   //!     signaled when the requested crash report is complete. 64-bit clients
   //!     should convert the value to a `HANDLE` using sign-extension.
   uint32_t report_complete_event;
 };
 #pragma pack(pop)
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_CLIENT_REGISTRATION_PROTOCOL_WIN_H_