Local mod folder names preserved. (#9844)

* Reduce conversion of local mod folder names to treat only ending spaces/dashes

* Wiki entry for GlobalUniques

* Missing originRuleset coverage

* Nicer RulesetValidator messages when name or originRuleset are missing

docs/Modders/Mod-file-structure/1-Overview.md

@@ -30,6 +30,7 @@ The JSON files that make up mods can have many different fields, and as not all
     - [Difficulties.json](5-Miscellaneous-JSON-files.md#difficultiesjson)
     - [Eras.json](5-Miscellaneous-JSON-files.md#erasjson)
     - [ModOptions.json](5-Miscellaneous-JSON-files.md#modoptionsjson)
+    - [GlobalUniques.json](5-Miscellaneous-JSON-files.md#globaluniquesjson)
     - [Tutorials.json](5-Miscellaneous-JSON-files.md#tutorialsjson)
 -   [Stats](3-Map-related-JSON-files.md#stats)
 -   [Sounds](../Images-and-Audio.md#sounds)

docs/Modders/Mod-file-structure/5-Miscellaneous-JSON-files.md

@@ -203,6 +203,14 @@ The formula for the gold cost of a unit upgrade is (rounded down to a multiple o
         ) ^ `exponent`
 With `civModifier` being the multiplicative aggregate of ["\[relativeAmount\]% Gold cost of upgrading"](../uniques.md#global-uniques) uniques that apply.
 
+## GlobalUniques.json
+
+Defines uniques that apply globally. e.g. Vanilla rulesets define the effects of Unhappiness here.
+Only the `uniques` field is used, but a name must still be set (the Ruleset validator might display it).
+When extension rulesets define GlobalUniques, all uniques are merged. At the moment there is no way to change/remove uniques set by a base mod.
+
+[link to original](https://github.com/yairm210/Unciv/tree/master/android/assets/jsons/GlobalUniques.json)
+
 ## Tutorials.json
 
 [link to original](https://github.com/yairm210/Unciv/tree/master/android/assets/jsons/Tutorials.json)