uni-make-socket and uni-make-process do not get defined for clisp

[louwers]

I'm using Common Lisp, but when loading load-act-r.lisp (and thus when loading support/uni-files.lisp) neither uni-make-socket nor uni-make-process gets defined, so start-environment fails.

Using this implementation: http://www.clisp.org/

Edit: it should be noted that compilation seems to run fine otherwise