Resume Downloads

[ghost]

Often a package will hang while downloading. I have left the script running overnight, but the progress will never continue. When this happens the download has not stopped - for example, the current package has hung and the speed is stuck a
ts 4.55MiB/s, not 0MiB/s.

The only way to fix this is to kill the script and start over, but the downloads start from the beginning. Is would it be possible to resume a failed download?