This is a minimal subset of the master commit b8aa3a579e
which fixes compile with --enable-experimental-features:
```
wallet/walletrpc.c: In function 'json_transaction_details':
wallet/walletrpc.c:521:56: error: 'const struct wallet_transaction' has no member named 'input_annotations'
521 | struct tx_annotation *ann = &tx->input_annotations[i];
| ^~
wallet/walletrpc.c:551:56: error: 'const struct wallet_transaction' has no member named 'output_annotations'
551 | struct tx_annotation *ann = &tx->output_annotations[i];
| ^~
```
Reported-by: @whitslack
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Fixed: build: compilation error when `--enable-experimental-features` configured.
3110d205a1