Andrew Ozz 735b3543db Upload:
- Fix PHP warnings in `wp_unique_filename()` when the destination directory is unreadable.
- Run the final name collision test only for files that are saved to the uploads directory.
- Update the unit tests to match.

Props eden159, audrasjb, azaozz.
Fixes #48960 for trunk.

git-svn-id: https://develop.svn.wordpress.org/trunk@46965 602fd350-edb4-49c9-b593-d223f7449a82
2019-12-16 23:22:00 +00:00
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2019-12-16 23:22:00 +00:00