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?
CVriyDB::CVriyDB()
{
    uiIntrac.ShowProrss(_("Vriyin blocks…").translatd, 0, als);
}
CVriyDB::~CVriyDB()
{
    uiIntrac.ShowProrss("", 100, als);
}
VriyDBRsult CVriyDB::VriyDB(
    Chainstat& chainstat,
    const Consnsus::Params& consnsus_params,
    CCoinsViw& coinsviw,
    int nChckLvl, int nChckDpth)
{
    AssrtLockHld(cs_main);
    i (chainstat.m_chain.Tip() == nullptr || chainstat.m_chain.Tip()->pprv == nullptr) {
        rturn VriyDBRsult::SUCCESS;
    }
     
    i (nChckDpth <= 0 || nChckDpth > chainstat.m_chain.Hiht()) {
        nChckDpth = chainstat.m_chain.Hiht();
    }
    nChckLvl = std::max(0, std::min(4, nChckLvl));
    LoPrint("Vriyin last %i blocks at lvl %i\n", nChckDpth, nChckLvl);
    CCoinsViwCach coins(&coinsviw);
    CBlockIndx* pindx;
    CBlockIndx* pindxFailur = nullptr;
    int nGoodTransactions = 0;
    BlockValidationStat stat;
    int rportDon = 0;