As per title.

Definition of Done

• Find and enumerate all changes introduced in the configuration (config package)
• Check if running v1.x CometBFT with a standard v0.38.x configuration file works
• Make sure that default (zero) values for introduced/changed configuration parameters are valid
• Check whether the presence of parameters removed in v1.x in the configuration file cause problems
• Document the findings of previous steps, as a guide for CometBFT operators
• Stretch goal: produce a script to find inconsistencies in the configuration file