vanishing messaging context names

[Volker Lendecke]

On Wed, Mar 29, 2017 at 10:53:04AM +1300, Andrew Bartlett via samba-technical wrote:
> I agree.  I've been bitten by it before. 
> 
> In any case, here is a patch.  The result of irpc_add_name() is no
> longer removed by talloc_free(), but is removed when the stream or task
> is terminated.  In source3 this is left as-was, but it is safe because
> only the notify server registers a name.

In source3/lib/messages_dgm.c we are using a different pattern: There
we store the "owning" pid in the messaging context and only destroy
the socket if the destructor is called by the owning process:

        if (getpid() == c->pid) {
                ....
                unlink(name.buf);
        }

There is probably not "the canonically perfect" way to do that, but I
think we should agree on a common pattern to handle this problem.

Volker

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