Make plugin activation options into dynamic global system variables

-- Unload the server_audit plugin dynamically,

-- but don't use UNINSTALL PLUGIN/UNINSTALL SONAME,

-- since that would remove the plugin's entry from mysql.plugins,

-- and prevent it from being reloaded when the server restarts.

SET GLOBAL server_audit=OFF;

-- Unload the cracklib_password_check plugin dynamically, 

-- but don't use UNINSTALL PLUGIN/UNINSTALL SONAME,

-- since that would remove the plugin's entry from mysql.plugins,

-- and prevent it from being reloaded when the server restarts.

SET GLOBAL cracklib_password_check=OFF;

-- Unload the unix_socket plugin dynamically.

-- In MariaDB 10.4 and later, it is statically linked into

-- the server, so UNINSTALL PLUGIN/UNINSTALL SONAME wouldn't work.

SET GLOBAL unix_socket=OFF;

-- Load the server_audit plugin dynamically,

-- and prevent it from being uninstalled.

SET GLOBAL server_audit='FORCE_PLUS_PERMANENT';

-- Load the pam plugin dynamically,

-- and prevent it from being uninstalled.

SET GLOBAL pam='FORCE_PLUS_PERMANENT';

SET GLOBAL server_audit='FORCE_PLUS_PERMANENT';

SET GLOBAL server_audit=OFF;

UNINSTALL PLUGIN server_audit;