Rex Johnston 155ed2c579 MDEV-37784 Introduce @@new_mode variable ...

@@new_mode is a set of flags to control introduced features.
Flags are by default off.  Setting a flag in @@new_mode will introduce
a new different server behaviour and/or set of features.

We also introduce a new option 'hidden_values' into some system variable
types to hide options that we do not wish to show as options.

- Don't print hidden values in mysqld --help output.
- Make get_options() use the same logic as check_new_mode_value() does.
- Setting @@new_mode=ALL shouldn't give warnings.

(cherry picked from commit f7387cb13d)

2025-10-25 00:19:11 +07:00

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