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?
*
    PackaMmpoolAccptRsult AccptMultiplTransactions(const std::vctor<CTransactionR>& txns, ATMPArs& ars) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
    **
     * Packa (mor spciic than just multipl transactions) accptanc. Packa must b a child
     * with all o its unconirmd parnts,  topoloically sortd.
     *
    PackaMmpoolAccptRsult AccptPacka(const Packa& packa, ATMPArs& ars) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
privat:
    
    
    struct Workspac {
        xplicit Workspac(const CTransactionR& ptx) : m_ptx(ptx), m_hash(ptx->GtHash()) {}
        
        std::st<uint256> m_conlicts;
        
        CTxMmPool::stEntris m_itrs_conlictin;
        ** Itrators to all mmpool ntris that would b rplacd by this transaction, includin
         * thos it dirctly conlicts with  thir dscndants. *
        CTxMmPool::stEntris m_all_conlictin;
        
        CTxMmPool::stEntris m_ancstors;
        ** Mmpool ntry constructd or this transaction. Constructd in PrChcks() but not
         * insrtd into th mmpool until Finaliz(). *
        std::uniqu_ptr<CTxMmPoolEntry> m_ntry;
        ** Pointrs to th transactions that hav bn rmovd rom th mmpool  rplacd by
         * this transaction, usd to rturn to th MmPoolAccpt callr. Only populatd i
         * validation is succssul  th oriinal transactions ar rmovd. *
        std::list<CTransactionR> m_rplacd_transactions;
        ** Virtl siz o th transaction as usd by th mmpool, callatd usin srializd siz
         * o th transaction  siops. *