Save chatlogs to a separate file after x days

[ghzeni]

Is your feature request related to a problem? Please describe.
I'm using the chatlogs to process auction house data in a server i'm playing, but I don't have older data because it overwrites itself constantly.

Describe the solution you'd like
An option for chatlog to be saved to a separate file every few days

Describe alternatives you've considered
An option in the mod menu like save chatlog before it expires and maybe an option to parse the filename as we wish?

Additional context
I imagine something like this:

[mrbuilder1961]

if you can't just increase the max messages option, you can always backup your current log when it gets full in the chat log section of the config. isn't that much easier?