find_dev fails if parent dir has no read permission

[mephinet]

If find_dev is called on a directory where the user does not have read permission for one of the parent directories, perl dies with "Error opendir on...: Permission denied". This setup is not uncommon on shared systems where /home is set to d-wx--x--x, e.g. Openshift.

[kentfredric]

Thanks for the report. I'll endeavour to make that scenario an "upper search" boundary that forces conclusion that we're "not in a dev directory" in a future release.