MAKE-SOCKET-PAIR: don't duplicate newly-created descriptors
MAKE-SOCKET-PAIR: don't duplicate newly-created descriptors

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