download of ts.bin (and names) should disallow control+c

[tjayrush]

Do this:

New install (notice that ts.bin is not present in $indexPath/mainnet)

Do

chifra status --terse

Notice it will start downloading the ts.bin file from Unchained Index IPFS location. Hit Control+C.

Notice we now have a partial file.

I much better way would be to have a value stored in the smart contract that tells the downloader what block is in the ts.bin, only download if later than the one on disc, disallow control+c during download or at least ensure that it downloaded a complete file (i.e. if the file is not complete, fix it), but only fix it if it's later than the original block number presently on the disc.