listing contents of directory without eXecute permission

[gotar]

As you are aware, using a directory requires at least rx. Without r (-?x) one cannot read directory contents (must type file names) and this case is supported currently, but having r without x (r?-) allows to read it contents, while mc throws 'Cannot change directory' error only (which is true). It could be slightly enhanced to:

1. keep 'Cannot change directory' warning (like 'Cannot read directory contents' for -r scenario),
2. don't change directory internally, behave like for VFS (e.g. archives),
3. enumerate contents (only file names, attributes are not available except bit indicating directory).