Update nation & town docs

Author: Veyronity

docs/nations.md

@@ -50,6 +50,7 @@ Example **POST** response
     "dynmapColour": "FFA500", // Nation's hex Dynmap colour
     "dynmapOutline": "FFFF00", // Nation's hex Dynmap outline
     "wiki": null, // The nation's wiki URL as a string if set, returns null if not
+    "discord": null, // The nation's discord URL
     "king": {
       "name": "tuzzzie",
       "uuid": "8391474f-4b57-412a-a835-96bd2c253219"

docs/towns.md

@@ -49,6 +49,7 @@ Example **POST** response
     "board": "Fishing every Friday! Join our Discord, link can be found on the signs!", // Town's board as seen on /t, null if none is present
     "founder": "tuzzzie", // The founder of the town as seen on /t
     "wiki": null, // The town's wiki URL as a string if set, returns null if not
+    "discord": null, // The town's wiki URL
     "mayor": {
       "name": "Fruitloopins",
       "uuid": "fed0ec4a-f1ad-4b97-9443-876391668b34"
@@ -71,8 +72,10 @@ Example **POST** response
       "isRuined": false, // True if the town is ruined
       "isForSale": false, // True if the town is for sale
       "hasNation": true, // True if the town has a nation
-      "hasOverclaimShield": false, // True if the town currently has an overclaim shield
       "canOutsidersSpawn": false, // True if the town allows outsiders to teleport
+      "canPassiveMobsSpawn": true, // True if the town has passive mob spawn enabled
+      "hasSnowAccumulation": true, // True if the town has snow accumulation enabled
+      "hasFriendlyFire": false, // True if the town has friendly-fire enabled
     },
     "stats": {
       "numTownBlocks": 473, // The total number of town blocks the town has