[racket] Unix domain sockets

Is there support for unix domain sockets in Racket?

I found some e-mails talking about it in 2007 but I couldn't find any
specific implementation in the documentation.

There is however talk about it in the db library.

  6.1 Local Sockets for PostgreSQL and MySQL Servers

  PostgreSQL and MySQL servers are sometimes configured by default to
  listen only on local sockets (also called “unix domain sockets”). This
  library provides support for communication over local sockets on Linux
  (x86 and x86-64) and Mac OS X. [1]

[1]  http://docs.racket-lang.org/db/notes.html