Merge branch 'fix/missing-config-settings' into 'develop'

Add missing invites_enabled and account_activation_required settings

See merge request pleroma/pleroma!2234

config/config.exs

@@ -219,6 +219,8 @@
     max_expiration: 365 * 24 * 60 * 60
   },
   registrations_open: true,
+  invites_enabled: false,
+  account_activation_required: false,
   federating: true,
   federation_incoming_replies_max_depth: 100,
   federation_reachability_timeout_days: 7,