`era-download` reports all files are stale

[lightclient]

When downloading era files, we see many of the following logs:

downloading from https://mainnet.era1.nimbus.team/mainnet-00261-a6f4bfca.era1
10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
/home/lc/.ethereum/geth/chaindata/ancient/era/mainnet-00262-1a75662f.era1 is stale
downloading from https://mainnet.era1.nimbus.team/mainnet-00262-1a75662f.era1
10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
/home/lc/.ethereum/geth/chaindata/ancient/era/mainnet-00263-21bf7eee.era1 is stale
downloading from https://mainnet.era1.nimbus.team/mainnet-00263-21bf7eee.era1
10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
/home/lc/.ethereum/geth/chaindata/ancient/era/mainnet-00264-d41eb83d.era1 is stale
downloading from https://mainnet.era1.nimbus.team/mainnet-00264-d41eb83d.era1
10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
/home/lc/.ethereum/geth/chaindata/ancient/era/mainnet-00265-e7a19561.era1 is stale
downloading from https://mainnet.era1.nimbus.team/mainnet-00265-e7a19561.era1
10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
/home/lc/.ethereum/geth/chaindata/ancient/era/mainnet-00266-4f172aab.era1 is stale
downloading from https://mainnet.era1.nimbus.team/mainnet-00266-4f172aab.era1

It seems like it prints this if the file is either not downloaded or if it was but the hash is different. I think it makes sense to separate these concepts and only print the stale message if the file is downloaded but the hashes don't match.

[ForrestKim42]

Im on it. maybe takes couple hours for make PR