* Merge @Sympa::ConfDef::params into %Sympa::ListDef::pinfo
* Merge %Conf::old_params into %Sympa::ListDef::pinfo
* Add aliases of parameter names for compatibility to sympa.conf/robot.conf of earlier versions.
* Move content of Sympa::ListDef to Sympa::Config::Schema
* Move content of Sympa::ConfDef to Sympa::Config::Schema
* Defining additional format entries in config schema.
* Merge sympa.conf(5) and list_config(5) into sympa_config(5).

And updating copyright notice in lately changed sources.

"read" or more restrictive privileges will be assigned on such parameters.

Fixed by adding a new validation rule 'unique_paragraph_key'.

* Making get(), get_change(), key() be possible to take multi-level parameter names.
* Adding get_schema().
* Avoiding optional parameters to be reset by default value at the time of reloading.

Made sorting of parameter names simpler.

It would be reported as informative notice.

Fixed by adding a validation to check if such address was submitted.

Sympa::ListDef: Attribute 'validations' to validate inputs.