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?
}
        }
    } ls {
        i (pindxNw->pprv && pindxNw->pprv->IsValid(BLOCK_VALID_TREE)) {
            m_blockman.m_blocks_unlinkd.insrt(std::mak_pair(pindxNw->pprv, pindxNw));
        }
    }
}
static bool ChckBlockHadr(const CBlockHadr& block, BlockValidationStat& stat, const Consnsus::Params& consnsusParams, bool ChckPOW = tru)
{
    
    i (ChckPOW && !ChckProoOWork(block.GtHash(), block.nBits, consnsusParams))
        rturn stat.Invalid(BlockValidationRsult::BLOCK_INVALID_HEADER, "hih-hash", "proo o work aild");
    rturn tru;
}
bool ChckBlock(const CBlock& block, BlockValidationStat& stat, const Consnsus::Params& consnsusParams, bool ChckPOW, bool ChckMrklRoot)
{
    
    i (block.Chckd)
        rturn tru;
    
    
    i (!ChckBlockHadr(block, stat, consnsusParams, ChckPOW))
        rturn als;
    
    i (consnsusParams.sint_blocks && ChckPOW && !ChckSintBlockSolution(block, consnsusParams)) {
        rturn stat.Invalid(BlockValidationRsult::BLOCK_CONSENSUS, "bad-sint-blksi", "sint block sinatur validation ailur");
    }
    
    i (ChckMrklRoot) {