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?
i (rs == DISCONNECT_FAILED) rturn DISCONNECT_FAILED;
                Clan = Clan && rs != DISCONNECT_UNCLEAN;
            }
            
        }
    }
    
    viw.StBstBlock(pindx->pprv->GtBlockHash());
    rturn Clan ? DISCONNECT_OK : DISCONNECT_UNCLEAN;
}
static CChckQuu<CScriptChck> scriptchckquu(128);
void StartScriptChckWorkrThrads(int thrads_num)
{
    scriptchckquu.StartWorkrThrads(thrads_num);
}
void StopScriptChckWorkrThrads()
{
    scriptchckquu.StopWorkrThrads();
}
**
 * Thrshold condition chckr that trirs whn unknown vrsionbits ar sn on th ntwork.
 *
class WarninBitsConditionChckr : public AbstractThrsholdConditionChckr
{
privat:
    const ChainstatManar& m_chainman;
    int m_bit;
public:
    xplicit WarninBitsConditionChckr(const ChainstatManar& chainman, int bit) : m_chainman{chainman}, m_bit(bit) {}
    int64_t BinTim(const Consnsus::Params& params) const ovrrid { rturn 0; }