CPANTS: suggestion for a new metric

[David Cantrell]

Some modules' tarballs don't set the x bit on directories, which makes 
it impossible for a non-root user to run Makefile.PL or the module's 
tests.  The usual cause is that the author suffers from Windows, and the 
fix is to use '--mode 755' when creating the tarball.

I think it would be a good idea for CPANTS to check that directories 
have the x bits set.  This would either be a new metric, or could be 
rolled into 'extracts_nicely', or could be combined with 'no_symlinks' 
and called 'uses_portable_filesystem_features' or something similar.

--
David Cantrell