Jb Audras 5cfa531d89 Grouped backports to the 5.5 branch.
- Media: Prevent CSRF setting attachment thumbnails.
- Embeds: Add protocol validation for WordPress Embed code.
- I18N: Introduce sanitization function for locale.
- Editor: Ensure block comments are of a valid form.

Merges [55760-55764] to the 5.5 branch.
Props dd32, isabel_brison, martinkrcho, matveb, ocean90, paulkevan, peterwilsoncc, timothyblynjacobs, xknown, youknowriad.



git-svn-id: https://develop.svn.wordpress.org/branches/5.5@55782 602fd350-edb4-49c9-b593-d223f7449a82
2023-05-16 15:43:00 +00:00
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2020-06-26 13:31:11 +00:00