IOLIB.PATHNAMES: remove dependency on cl-ppcre.
IOLIB.PATHNAMES: remove dependency on cl-ppcre.

lispnik/iolib,shamazmazum/iolib,vsedach/iolib-simple-mux,tiago4orion/iolib,attila-lendvai/iolib,dkochmanski/iolib,sionescu/iolib,shamazmazum/iolib,tiago4orion/iolib,lispnik/iolib,shamazmazum/iolib,deadtrickster/iolib,dkochmanski/iolib,attila-lendvai/iolib,attila-lendvai/iolib,dkochmanski/iolib,deadtrickster/iolib,lispnik/iolib,deadtrickster/iolib,sionescu/iolib,vsedach/iolib-simple-mux,tiago4orion/iolib,sionescu/iolib