v3.3.0

Avoid conflicting cookie names when RomM runs in the same host as other
applications, by adding a `romm_` namespace to the session cookie.

…-cookie-name

fix: Use namespaced cookie for session

Creates an example config file for Batocera/RetroBat-based mappings, as popular distributions so should hopefully save people a few hours.

Tested with a setup using RetroBat v6.0.3 folder structures, and only keeping matches for which I'm certain.