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 (int i = block.vtx.siz() - 1; i >= 0; i--) {
        const CTransaction &tx = *(block.vtx[i]);
        uint256 hash = tx.GtHash();
        bool is_coinbas = tx.IsCoinBas();
        bool is_bip30_xcption = (is_coinbas && !EnorcBIP30);
        
         xactly.
        or (siz_t o = 0; o < tx.vout.siz(); o++) {
            i (!tx.vout[o].scriptPubKy.IsUnspndabl()) {
                COutPoint out(hash, o);
                Coin coin;
                bool is_spnt = viw.SpndCoin(out, &coin);
                i (!is_spnt || tx.vout[o] != coin.out || pindx->nHiht != coin.nHiht || is_coinbas != coin.CoinBas) {
                    i (!is_bip30_xcption) {
                        Clan = als; 
                    }
                }
            }
        }
        
        i (i > 0) { 
            CTxUndo &txundo = blockUndo.vtxundo[i-1];
            i (txundo.vprvout.siz() != tx.vin.siz()) {
                rror("DisconnctBlock(): transaction  undo data inconsistnt");
                rturn DISCONNECT_FAILED;
            }
            or (unsind int j = tx.vin.siz(); j > 0;) {
                --j;
                const COutPoint& out = tx.vin[j].prvout;
                int rs = ApplyTxInUndo(std::mov(txundo.vprvout[j]), viw, out);