You can clone with
It;'s possible to have aria2c built without this feature, therefore a workaround should be available, e.g. you could retry the same download command without this parameter if it fails.
some more info : http://sourceforge.net/p/aria2/bugs/286/
Work around broken behaviour in aria2 async DNS
The async DNS implementation in aria2 does not support dual stack
properly. This works around that (by disabling async DNS when it