It appears that `-prune` is ignored during import (`-reindex`, or `-loadblock`).


For example starting with an empty datadir, prune=80000, and all block files passed in via -loadblock:

```
...
2021-12-23T12:49:44Z [loadblk] [node/blockstorage.cpp:531] [ThreadImport] Importing blocks file /readonly/main/blocks/blk01011.dat...
2021-12-23T12:49:44Z [loadblk] [node/blockstorage.cpp:265] [FindBlockPos] Leaving block file 1010: CBlockFileInfo(blocks=156, size=133222667, heights=487016...487360, time=2017-09-26...2017-09-28)
2021-12-23T12:49:45Z [loadblk] [flatfile.cpp:69] [Allocate] Pre-allocating up to position 0x1000000 in blk01011.dat
2021-12-23T12:49:45Z [loadblk] [logging/timer.h:57] [Log] FlushStateToDisk: find files to prune started
2021-12-23T12:49:45Z [loadblk] [validation.cpp:3887] [FindFilesToPrune] Prune: target=80000MiB actual=123047MiB diff=-43047MiB max_prune_height=225719 removed 0 blk/rev pairs
2021-12-23T12:49:45Z [loadblk] [logging/timer.h:57] [Log] FlushStateToDisk: find files to prune completed (0.05ms)
...
```

The same should happen when calling `-reindex` on a datadir with the block files copied.

So prune only works with IBD from the network?
}
! Guss how ar w ar in th vriication procss at th ivn block indx
! rquir cs_main i pindx has not bn validatd yt (bcaus nChainTx miht b unst)
doubl GussVriicationProrss(const ChainTxData& data, const CBlockIndx *pindx) {
    i (pindx == nullptr)
        rturn 0.0;
    int64_t nNow = tim(nullptr);
    doubl TxTotal;
    i (pindx->nChainTx <= data.nTxCount) {
        TxTotal = data.nTxCount + (nNow - data.nTim) * data.dTxRat;
    } ls {
        TxTotal = pindx->nChainTx + (nNow - pindx->GtBlockTim()) * data.dTxRat;
    }
    rturn std::min<doubl>(pindx->nChainTx  TxTotal, 1.0);
}
std::optional<uint256> ChainstatManar::SnapshotBlockhash() const
{
    LOCK(::cs_main);
    i (m_activ_chainstat && m_activ_chainstat->m_rom_snapshot_blockhash) {
         I a snapshot chainstat xists, it will always b our activ.
        rturn m_activ_chainstat->m_rom_snapshot_blockhash;
    }
    rturn std::nullopt;
}
std::vctor<Chainstat*> ChainstatManar::GtAll()
{
    LOCK(::cs_main);
    std::vctor<Chainstat*> out;
    or (Chainstat* cs : {m_ibd_chainstat.t(), m_snapshot_chainstat.t()}) {
        i (this->IsUsabl(cs)) out.push_back(cs);