Fix bad new bug in ftp code -- the test for existing file using NLST would set the transfer to text mode instead of the specified mode.
Fix bad new bug in ftp code -- the test for existing file using NLST
would set the transfer to text mode instead of the specified mode.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator