Updater unable to add default 'latin1' mysql_charset to configuration file: Application configuration file is not writable

[websavers]

Got this error upon upgrade. The reason isn't a surprise - the config file has tight permissions. Just confirming that the configuration file should have this in it:

$mysql_charset = 'latin1';

Some of our tables (presumably the oldest ones) do indeed use latin1 charsets, though some (presumably the newer ones) use utf8. I'm not spotting any problems with character encodings after adding the above to the config file, however just thought I'd check to confirm others have that same configuration. I'd imagine those of you with newer initial installs would have it set to 'utf8' and all tables would use utf8 character encoding.

[pRieStaKos]

I got `utf8` due to Greek language.