server: Keep a file descriptor open to the config directory to make sure we don't write the registry in the wrong place.

Use S_FALSE for saying sample is rejected.

When stopped video renderer no longer updates, so don't even try.

msi: Fix the value parameter of IWineMsiRemotePackage::FormatRecord to have the right level of indirection for an [out] parameter.

Remove the redundant size parameter and simplify the client code such 
that the remote function is only called once, with the value being 
automatically allocated. Add corresponding code on the server side to 
automatically allocate said value.