(c2604) @schmoozerd
* Move Weather handling from World to Map class
* Add new Map::SetWeather function to force a weather for a zone
* Allow .wchange command to also create Thunderstorm or BlackRain
(c2609) @cala
- Remove enums irrelevant for Classic
- Fixe a few errors in auto merge from previous backport
- Change packet formatting to Classic structure
Thanks @stfx for his help and reviewing this fix and @laizerox for research
