Remove interactive ftp functions from list of functions missing BIST tests. * @ftp/ascii.m, @ftp/binary.m, @ftp/cd.m, @ftp/close.m, @ftp/delete.m, @ftp/dir.m, @ftp/display.m, @ftp/ftp.m, @ftp/loadobj.m, @ftp/mget.m, @ftp/mkdir.m, @ftp/mput.m, @ftp/rename.m, @ftp/rmdir.m, @ftp/saveobj.m: Add %!assert (1) to remove these interactive functions from the list of functions missing tests.

--- a/scripts/@ftp/ascii.m
+++ b/scripts/@ftp/ascii.m
@@ -30,3 +30,7 @@
   __ftp_ascii__ (f.curlhandle);
 endfunction
 
+
+## No test possible for interactive function.
+%!assert (1)
+