r11093: Implement wb_queue_domain_send: If the domain is not yet initialized, do...

r11093: Implement wb_queue_domain_send: If the domain is not yet initialized, do that
first. And if a request is being processed, queue it. This correctly survived
3 endless loops with wbinfo's doing different things while starting up smbd.

The number of indirections starts to become a bit scary, but what can you do
without a decent programming language that provides closures :-)

One thing that we might consider is to auto-generate async rpc requests that
return composite_context structs instead of rpc_requests. Otherwise I'd have
to write a lot of wrappers like composite_netr_LogonSamLogon_send.

The alternative would be to write two versions of wb_queue_domain_send which I
would like to avoid. This is cluttered enough already.

Volker
(This used to be commit 66c1b674f9870de73cce0e611909caf9eff34baa)