[bug #58654] -perm -+w does not behave like chmod (POSIX)

Update of bug #58654 (project findutils):

             Assigned to:                    None => berny                  

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Follow-up Comment #4:

IMO, POSIX [1] is a tiny bit blurry about whether 'find -perm [-]MODE' shall
use
the umask value (as e.g. chmod) or not:

[1] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/find.html

- "To start, a template shall be assumed with all file mode bits cleared.",
- "An op symbol of '+' shall set the appropriate mode bits in the template;
[...]"
- "'=' shall set the appropriate mode bits, without regard to the contents
   of the file mode creation mask of the process.".

So all we have for the + operator is that it should add the "appropriate"
(whatever "appropriate" means in this context) mode bits on top of 0000.
Therefore, I think that the current implementation follows the
specification.

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