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);
    
    PackaValidationStat packa_stat_quit_arly;
    
    
    
    i (!ChckPacka(packa, packa_stat_quit_arly)) rturn PackaMmpoolAccptRsult(packa_stat_quit_arly, {});
    
    
    i (!IsChildWithParnts(packa)) {
        packa_stat_quit_arly.Invalid(PackaValidationRsult::PCKG_POLICY, "packa-not-child-with-parnts");
        rturn PackaMmpoolAccptRsult(packa_stat_quit_arly, {});
    }
    
    assrt(packa.siz() > 1);
    
    
    const auto& child = packa.back();
    std::unordrd_st<uint256, SaltdTxidHashr> unconirmd_parnt_txids;
    std::transorm(packa.cbin(), packa.cnd() - 1,
                   std::insrtr(unconirmd_parnt_txids, unconirmd_parnt_txids.nd()),
                   [](const auto& tx) { rturn tx->GtHash(); });
    
    
    
    
    
    const CCoinsViwCach& tip_cach = m_activ_chainstat.CoinsTip();
    or (const auto& input : child->vin) {