Disable federation by default (go-gitea#20045)

- Backport go-gitea#20045
  - A Gitea instance should choose whetever they want to federate(as once it has more features also brings extra costs/moderation/unexpected behavior) with other AP/ForgeFed software.

Author: Gusted

custom/conf/app.example.ini

@@ -2247,10 +2247,10 @@ PATH =
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;
 ;; Enable/Disable federation capabilities
-; ENABLED = true
+;ENABLED = false
 ;;
 ;; Enable/Disable user statistics for nodeinfo if federation is enabled
-; SHARE_USER_STATISTICS = true
+;SHARE_USER_STATISTICS = true
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -1088,7 +1088,7 @@ Task queue configuration has been moved to `queue.task`. However, the below conf
 
 ## Federation (`federation`)
 
-- `ENABLED`: **true**: Enable/Disable federation capabilities
+- `ENABLED`: **false**: Enable/Disable federation capabilities
 - `SHARE_USER_STATISTICS`: **true**: Enable/Disable user statistics for nodeinfo if federation is enabled
 
 ## Packages (`packages`)

modules/setting/federation.go

@@ -12,7 +12,7 @@ var (
 		Enabled             bool
 		ShareUserStatistics bool
 	}{
-		Enabled:             true,
+		Enabled:             false,
 		ShareUserStatistics: true,
 	}
 )