Add option to obfuscate domain name in public list of domain blocks (#15355)

- Replace the middle of the domain with * characters (except for periods)
- Add SHA-256 digest of the domain name in tooltip

app/controllers/admin/domain_blocks_controller.rb

@@ -74,11 +74,11 @@ module Admin
     end
 
     def update_params
-      params.require(:domain_block).permit(:severity, :reject_media, :reject_reports, :private_comment, :public_comment)
+      params.require(:domain_block).permit(:severity, :reject_media, :reject_reports, :private_comment, :public_comment, :obfuscate)
     end
 
     def resource_params
-      params.require(:domain_block).permit(:domain, :severity, :reject_media, :reject_reports, :private_comment, :public_comment)
+      params.require(:domain_block).permit(:domain, :severity, :reject_media, :reject_reports, :private_comment, :public_comment, :obfuscate)
     end
   end
 end