Update MySQL recommendations for Character Set and Colation

[JamesTilt]

Describe the bug

When I was upgrading I received the MySQL configuration setting recommendations:

character_set_client = utf8mb4
collation_server = utf8mb4_unicode_ci

I made the changes to my MySQL configuration but received an error when restarting MySQL: COLLATION 'utf8mb4_unicode_ci' is not valid for CHARACTER SET 'latin1'.

There is another spot where it states these errors and gives a different MySQL configuration:

character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci

I used those settings and I was able to remove the cacti warning along with being able to restart MySQL.

To Reproduce

I was upgrading from 1.2.2 to 1.2.14 but I would assume this would happen with any MySQL configured for latin1.

Launch the upgrade and the second screen you will see the recommendations vs what is currently set.

Expected behavior

I expected to be able to use the field and value from the install/upgrade screen and put that into the MySQL config file and it allow me to update the configuration.

Server

• OS: Ubuntu 18.04

• MySQL 5.7

• Version 1.2.2 going to Version 1.2.14

Additional context

I think the code might be in the lib/utility.php file. I think the fix might to just update the notes to have the correct key value for the MySQL config. The file where the other message displays is more than likely from the lib/installer.php file.