K 10 svn:author V 3 jtn K 8 svn:date V 27 2013-04-23T07:50:27.761915Z K 7 svn:log V 264 Add "allowed_terrains" to nation ruleset compatibility section, and make unknown/disallowed terrain types in natural city names into hard errors. Improve other city name error handling. Fix up civ1/civ2 cities not to reference "lake" terrain. See gna patch #3860. END