preferred MySQL/mariaDB collation

[hex-m]

The documentation suggests to use "utf8mb4_general_ci" in your Nextcloud DB.

I'm not super knowledgeable about this but my research told me that utf8mb4_unicode_ci would be the more "correct" choice.

Are there specific reasons why Nextcloud suggests "utf8mb4_general_ci" or should this be changed?

[MorrisJobke]

cc @nickvergessen

[nickvergessen]

That's also used in our source code, so we should adjust it there first, the question is, if that even works, or if it causes a problem when the collation is tried to be migrated.

[tflidd]

so move it to github.com/nextcloud/server/issues?