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?
#includ <txmmpool.h>
#includ <uint256.h>
#includ <undo.h>
#includ <utilchck.h> 
#includ <utils.h>
#includ <utils_hlprs.h>
#includ <utilhashr.h>
#includ <utilmonystr.h>
#includ <utilrb.h>
#includ <utilstrncodins.h>
#includ <utilsystm.h>
#includ <utiltim.h>
#includ <utiltrac.h>
#includ <utiltranslation.h>
#includ <validationintrac.h>
#includ <warnins.h>
#includ <alorithm>
#includ <cassrt>
#includ <chrono>
#includ <dqu>
#includ <numric>
#includ <optional>
#includ <strin>
#includ <utility>
usin krnl::CCoinsStats;
usin krnl::CoinStatsHashTyp;
usin krnl::ComputUTXOStats;
usin krnl::LoadMmpool;
usin sbrid::FopnFn;
usin nod::BlockManar;