bug#33847: 27.0.50; emacsclient does not find server socket

[Ulrich Mueller]

>>>>> On Fri, 28 Dec 2018, Paul Eggert wrote:

> We don't need to attack the problem in general, only the problem on
> platforms that have XDG_RUNTIME_DIR. What sort of platforms have
> XDG_RUNTIME_DIR but do not use systemd, and how does one start a
> user-specific server on such platforms?

See my original report, OpenRC and start-stop-daemon.

So you're saying that on systems that don't have XDG_RUNTIME_DIR,
placing the socket under TMPDIR is fine? Because I don't understand
that argument. If TMPDIR has security problem, then it shouldn't be
used anywhere. If it hasn't, then why can't we keep the current
(Emacs 26) solution?