cyanogenmod - How to reset Wi-Fi settings?

Somehow Wi-Fi stopped connecting on my phone. It is not a hardware issue, as it does work when I perform a reset.

What files do I need to delete to get Wi-Fi back working? I don’t want to reset my phone.

^{If relevant, model is Sony Arc S, using CM9.}

Answer

I removed /data/etc/wifi, /data/misc/dhcp and /data/misc/wifi and it worked.