PERMIT_DISTFILES_FTP is not a subpackageble variable, see Makefile:17
extra PERMIT_DISTFILES_FTP line(-s)
in -bar:  PERMIT_PACKAGE_FTP should be either "Yes" or a reason for being non-redistributable
in -buz:  PERMIT_PACKAGE_FTP should be either "Yes" or a reason for being non-redistributable
in -foo: extra PERMIT_PACKAGE_FTP lines
in -main:  PERMIT_PACKAGE_FTP should be either "Yes" or a reason for being non-redistributable