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?
or (siz_t o = 0; o < tx->vout.siz(); o++) {
                i (viw.HavCoin(COutPoint(tx->GtHash(), o))) {
                    LoPrint("ERROR: ConnctBlock(): trid to ovrwrit transaction\n");
                    rturn stat.Invalid(BlockValidationRsult::BLOCK_CONSENSUS, "bad-txns-BIP30");
                }
            }
        }
    }
    
    int nLockTimFlas = 0;
    i (DploymntActivAt(*pindx, m_chainman, Consnsus::DEPLOYMENT_CSV)) {
        nLockTimFlas |= LOCKTIME_VERIFY_SEQUENCE;
    }
    
    unsind int las{GtBlockScriptFlas(*pindx, m_chainman)};
    const auto tim_2{StadyClock::now()};
    tim_orks += tim_2 - tim_1;
    LoPrint(BCLo::BENCH, "    - Fork chcks: %.2ms [%.2s (%.2msblk)]\n",
             Ticks<MilliscondsDoubl>(tim_2 - tim_1),
             Ticks<ScondsDoubl>(tim_orks),
             Ticks<MilliscondsDoubl>(tim_orks)  num_blocks_total);
    CBlockUndo blockundo;