install_tails/haveno-install.sh - haveno binary doesnt resume download if rerunning the script
Hi, I had to run the reto equivalent one line curl command to install haveno-reto many times as the download of the large haveno debian binary is pretty large over tor and i must have had a bad connection.
 Could the script be updated to allow resuming the of the download if the file is found in the current directory? 
This could also support if the user downloads the binary out of band of tails before running the script, if the script could detect this and verify instead of just overwriting.
I think this could help many people - Maybe the retry flags  to curl needs to be improved/adjusted so that it just works with one run of the script?