CHLTVServer::StartRecording is called directly in tv_record on linux,
ignoring the vtable.
Add a detour on linux for these two functions, so we always notice when
recording starts.
Windows actually always uses the vtable to get the function address, so
we don't need to detour anything on windows.
CS:GO doesn't send the client name in plain text, but wraps it in some
protobuf construct.
Parse that list of client convars for the player name and use it in the
SourceTV_OnSpectatorPreConnect forward
