Adds missing info about non-standard functionality

README.md

@@ -43,6 +43,22 @@ mirror the values set in config.yml. This also means that configuration values a
 citizen's NPC save file. While you can manually set the values using the same keys as in config.yml, you should use the
 `/blacksmith` or `/scrapper` command when possible.
 
+### Non-standard functionality
+
+There is some non-standard optional functionality for blacksmiths and scrappers that goes beyond repairing things with
+durability. They can all be enabled or disabled using configuration values.
+
+- Blacksmiths can repair anvils if the option `reforgeAnvils` is enabled
+- Scrappers can remove armor trim from items if `salvageArmorTrims` is enabled. This will always be done before
+  salvaging the item itself. If not enabled, the item is considered un-salvageable.
+- Scrappers can remove netherite from items if `salvageNetherite` is enabled. This will be done if no armor trim exists,
+  before normal salvage. If not enabled, the item is considered un-salvageable.
+- Scrappers can salvage enchanted items, and return some XP based on the enchantment set if `salvageEnchanted` is
+  enabled. If not enabled, the item is considered un-salvageable.
+- Scrappers can salvage just about anything with a crafting table recipe if `extendedSalvageEnabled` is enabled. As long
+  as you have the amount of items produced by a crafting recipe, you can undo the recipe. Four planks can be salvaged
+  into a log as an example.
+
 ### Special behavior
 
 In addition to just being able to repair items, blacksmiths / scrappers have some random features which can be cool or