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.
Keep the instances in seperate wrappers to clear up the hooks. This
allows for some OnServerStart and OnServerShutdown forwards.
To prepare support for relay servers, CHLTVServer::Shutdown is hooked to
detect shutdown instead of relying on the director unregistering the
instance.
CSS' CBaseClient::ClientPrintf tries to use the net channel directly
instead of going through the saner route using GameClient::SendNetMsg.
This introduces a stupid hack to work around the bots lack of a net
channel, so ClientPrintf's SVC_Print messages get included in the demo.
