Introduce ruleset defined effects
Add 4 user effects. They can be given meaning by the ruleset from Lua.
See also gna patch #2979 - https://web.archive.org/web/20170224192354/http://gna.org/patch/?2979
Why S3_1?
Reply To cazfi
So I can deprecate the versions of Lua's unit move and teleport that doesn't specify the side effects already in 3.1. They at least need access to War.
Add 4 user effects. They can be given meaning by the ruleset from Lua.
See also gna patch #2979 - https://web.archive.org/web/20170224192354/http://gna.org/patch/?2979