update comment, win32 detection, not "windows"
update comment, win32 detection, not "windows"

reaperhulk/pynacl,pyca/pynacl,reaperhulk/pynacl,xueyumusic/pynacl,lmctv/pynacl,lmctv/pynacl,pyca/pynacl,lmctv/pynacl,xueyumusic/pynacl,pyca/pynacl,xueyumusic/pynacl,lmctv/pynacl,lmctv/pynacl,reaperhulk/pynacl,xueyumusic/pynacl,pyca/pynacl,pyca/pynacl,reaperhulk/pynacl,reaperhulk/pynacl