On Windows, application-specific settings are stored in the registry under HKCU\Console\<path_to_app>.
Our implementation of conhost.exe does not know which process is connected to it, so we need to get the full process image name before loading any application-specific console settings.
To do this, we extend the server protocol to pass the process Id of the connected console process to conhost.exe.
Please run tools/make_requests before merging.
-- v4: conhost: Load/Save console settings using the process path or window title