I believe that unix-socket (37) and unix-domain-sockets (19) refer to the same thing. Seeing as the former is shorter, still unambiguous, and has more questions tagged to it, I'd use that as the canonical name, and the latter as an alias for it.
closed as off-topic by MichaelT, Shadow Wizard, Roombatron5000, random, Aziz Shaikh Sep 24 '14 at 4:58
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