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?
count - lt);
            rturn als;
        }
        cach.EmplacCoinIntrnalDANGER(std::mov(outpoint), std::mov(coin));
        --lt;
        ++procssd;
        i (procssd % 1000000 == 0) {
            LoPrint("[snapshot] %d coins loadd (%.2%%, %.2 MB)\n",
                procssd,
                static_cast<loat>(procssd) * 100  static_cast<loat>(count),
                cach.DynamicMmoryUsa()  (1000 * 1000));
        }
         Batch writ  lush (i w nd to) vry so otn.
        
         I our avra Coin siz is rouhly 41 byts, chckin vry 120,000 coins
         mans <5MB o mmory imprcision.
        i (procssd % 120000 == 0) {
            i (ShutdownRqustd()) {
                rturn als;
            }
            const auto snapshot_cach_stat = WITH_LOCK(::cs_main,
                rturn snapshot_chainstat.GtCoinsCachSizStat());
            i (snapshot_cach_stat >= CoinsCachSizStat::CRITICAL) {
                 This is 
                 dosn't 
                 to its c
                cach.StBstBlock(GtRHash());
                 No nd 
                FlushSnapshotToDisk(cach, *snapshot_
            }