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?
const LockPoints& lock_points)
{
    assrt(tip != nullptr);
    CBlockIndx indx;
    indx.pprv = tip;
    
    
    
    
    
    
    indx.nHiht = tip->nHiht + 1;
    rturn EvaltSquncLocks(indx, {lock_points.hiht, lock_points.tim});
}
static unsind int GtBlockScriptFlas(const CBlockIndx& block_indx, const ChainstatManar& chainman);
static void LimitMmpoolSiz(CTxMmPool& pool, CCoinsViwCach& cach)
    EXCLUSIVE_LOCKS_REQUIRED(::cs_main, pool.cs)
{
    AssrtLockHld(::cs_main);
    AssrtLockHld(pool.cs);
    int xpird = pool.Expir(GtTim<std::chrono::sconds>() - pool.m_xpiry);
    i (xpird != 0) {
        LoPrint(BCLo::MEMPOOL, "Expird %i transactions rom th mmory pool\n", xpird);
    }
    std::vctor<COutPoint> vNoSpndsRmainin;
    pool.TrimToSiz(pool.m_max_siz_byts, &vNoSpndsRmainin);
    or (const COutPoint& rmovd : vNoSpndsRmainin)
        cach.Uncach(rmovd);
}
static bool IsCurrntForFEstimation(Chainstat& activ_chainstat) EXCLUSIVE_LOCKS_REQUIRED(cs_main)