xdr: Update XDR to support network confirm transaction type

[tsachiherman]

What

Update XDR to support network confirm transaction type.

There will be a new transaction type NetworkConfirm (todo: confirm this name). We should ingest/store/etc this like any other transaction.

Epic

stellar/stellar-cli#519

[2opremio]

@tsachiherman I have bumped the XDR definitions at #4851 but I don't see any NetworkConfirm transaction type. I will ask on Slack

[sisuresh]

@tsachiherman Is this issue about consuming changes to network settings? If so, there's no new operation or transaction type. There's a new ledger entry type (CONFIG_SETTING), and you can consume the changes for it through tx meta.

[tsachiherman]

@tsachiherman Is this issue about consuming changes to network settings? If so, there's no new operation or transaction type. There's a new ledger entry type (CONFIG_SETTING), and you can consume the changes for it through tx meta.

I see. @2opremio do we need to update the ingestion to ignore this ledger entry type ?

[2opremio]

I think the new entry is already being considered for ingestion in Horizon (probably just ignored). @tamirms @Shaptic do you remember?