fixing overidentification of p2ms by moving the case statement below p2wpkh, p2wsh, p2tr.

[turkycat]

segwit scripts end in hashes that may end in xAE which is misinterpreted as OP_CHECKSIG. script type is reported as p2ms in these cases.

example: ed35633eaa28f4452c4eb1b45df9f9667878f23e05a40116660bec381a000000 vout: 3

fix is simple enough: move the case statement below the segwit script types.

I also tweaked the README a bit, I hope it adds value.

before my change:

$ ./bitcoin-utxo-dump -db ~/scratch/bitcoin/node-data-copy/chainstate -f txid,vout,height,amount,script,type
...
Total UTXOs: 83310739
Total BTC:   19266337.75311853
Script Types:
 p2tr         318515
 non-standard 9565
 p2pk         47584
 p2pkh        47777074
 p2sh         15252482
 p2ms         516634
 p2wpkh       18273276
 p2wsh        1115609

after my change:

$ ./bitcoin-utxo-dump -db ~/scratch/bitcoin/node-data-copy/chainstate -f txid,vout,height,amount,script,type
...
Total UTXOs: 83310739
Total BTC:   19266337.75311853
Script Types:
 non-standard 9565
 p2pk         47584
 p2pkh        47777074
 p2sh         15252482
 p2ms         440424
 p2wpkh       18343108
 p2wsh        1120662
 p2tr         319840

difference:

 non-standard 0
 p2pk         0
 p2pkh        0
 p2sh         0
 p2ms         -76,210
 p2wpkh       +69,832
 p2wsh        +5,053
 p2tr         +1,325