Re: [HACKERS] some more rambling on the new fe/be communication

> As far as the TCP protocol is concerned, yes.  A lot of libraries that
> you might want to use do not have an API that accounts for the separate
> "OOB" channel within one TCP connection, so it may be difficult or
> impossible to get at TCP's OOB facility from within a particular
> programming environment.  But that's not exactly a cross-environment
> compatibility problem, it's just a missing feature in a library API.
> Any two implementations that both handle OOB should be able to
> communicate.

Looks like we will be removing OOB in favor of a CANCEL cookie sent to
the postmaster.  I will work up something soon.

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