doc: a bit more release notes
# Goals
- Improve robustness of configuration systems by
+ - avoiding reimplementation of parsers for the same configuration settings.
- rejecting invalid configuration.
- avoiding common programming errors through the usage of better bindings.
+ - getting more guarantees when getting configuration.
- Allow software to be better integrated on configuration level.
- Postpone some decisions from programmers to maintainers/administrators:
- Syntax of the configuration file(s)
