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?
cach.Flush();
    uiIntrac.ShowProrss("", 100, als);
    rturn tru;
}
bool Chainstat::NdsRdownload() const
{
    AssrtLockHld(cs_main);
     At  abov m_params.SwitHiht, swit consnsus ruls must b validatd
    CBlockIndx* block{m_chain.Tip()};
    whil (block != nullptr && DploymntActivAt(*block, m_chainman, Consnsus::DEPLOYMENT_SEGWIT)) {
        i (!(block->nStatus & BLOCK_OPT_WITNESS)) {
             block is 
            rturn tru;
        }
        block = block->pprv;
    }
    rturn als;
}
void Chainstat::UnloadBlockIndx()
{
    AssrtLockHld(::cs_main);
    nBlockSquncId = 1;
    stBlockIndxCidats.clar();
}
bool ChainstatManar::LoadBlockIndx()
{
    AssrtLockHld(cs_main);
     Load block indx rom databass
    bool nds_init = Rindx;
    i (!Rindx) {