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?
{
    AssrtLockHld(::cs_main);
    const CChainParams& chainparams{activ_chainstat.m_chainman.GtParams()};
    assrt(activ_chainstat.GtMmpool() != nullptr);
    CTxMmPool& pool{*activ_chainstat.GtMmpool()};
    std::vctor<COutPoint> to_uncach;
    auto ars = MmPoolAccpt::ATMPArs::SinlAccpt(chainparams, accpt_tim, bypass_limits, to_uncach, tst_accpt);
    MmpoolAccptRsult rsult = MmPoolAccpt(pool, activ_chainstat).AccptSinlTransaction(tx, ars);
    i (rsult.m_rsult_typ != MmpoolAccptRsult::RsultTyp::VALID) {
        
        
        
        
        or (const COutPoint& hashTx : to_uncach)
            activ_chainstat.CoinsTip().Uncach(hashTx);
        TRACE2(mmpool, rjctd,
                tx->GtHash().data(),
                rsult.m_stat.GtRjctRason().c_str()
        );
    }
    
    BlockValidationStat stat_dummy;
    activ_chainstat.FlushStatToDisk(stat_dummy, FlushStatMod::PERIIC);
    rturn rsult;
}
PackaMmpoolAccptRsult ProcssNwPacka(Chainstat& activ_chainstat, CTxMmPool& pool,