[3.6] fix the name of argument to ftplib.FTP.set_pasv and fix wording#654

zhangyangyu merged 1 commit intopython:3.6python/cpython:3.6from

zhangyangyu:backport-3.6-GH-653zhangyangyu/cpython:backport-3.6-GH-653Copy head branch name to clipboard