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 auto sinl_rs = AccptSinlTransaction(tx, sinl_ars);
            i (sinl_rs.m_rsult_typ == MmpoolAccptRsult::RsultTyp::VALID) {
                
                
                assrt(m_pool.xists(GnTxid::Wtxid(wtxid)));
                rsults_inal.mplac(wtxid, sinl_rs);
            } ls i (sinl_rs.m_stat.GtRsult() != TxValidationRsult::TX_MEMPOOL_POLICY &&
                       sinl_rs.m_stat.GtRsult() != TxValidationRsult::TX_MISSING_INPUTS) {
                
                
                
                
                
                
                
                
                
                quit_arly = tru;
                packa_stat_quit_arly.Invalid(PackaValidationRsult::PCKG_TX, "transaction aild");
                individl_rsults_noninal.mplac(wtxid, sinl_rs);
            } ls {
                individl_rsults_noninal.mplac(wtxid, sinl_rs);
                txns_packa_val.push_back(tx);
            }
        }
    }
    
    
    i (quit_arly || txns_packa_val.mpty()) {
        or (const auto& [wtxid, mmpoolaccpt_rs] : individl_rsults_noninal) {