[OLE #10] Make out of process COM work with OXID based marshal ids

[Robert Shearman]

Mike Hearn wrote:

>This patch makes InstallShield work again, and should let you get
>further Bill.
>
>- Ensure all intermediate threads join the original apartment
>- Make the listener thread fully apartment scoped (one per apt not per
>  process)
>- Improve "already have mid" error message
>- Rename _StubReaderThread to stub_dispatch_thread
>- Improve tracing
>  
>

Can you submit this patch again, but without the local server changes? 
You have persuaded me that this is the only way to keep things working 
for the moment. I'll submit a seperate patch for the local server 
problem, if that's ok with you.

Rob