Allow turning keybase off instance-wide

config/locales/en.yml

@@ -252,6 +252,7 @@ en:
       feature_timeline_preview: Timeline preview
       features: Features
       hidden_service: Federation with hidden services
+      keybase: Keybase integration
       open_reports: open reports
       recent_users: Recent users
       search: Full-text search

config/settings.yml

@@ -31,6 +31,7 @@ defaults: &defaults
   system_font_ui: false
   noindex: false
   hide_followers_count: false
+  enable_keybase: true
   flavour: 'glitch'
   skin: 'default'
   aggregate_reblogs: true