Add utility functions to use the DNS resolver contract #1
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The
setDNSRecordsFromZone(name, rrs)
function allows editing, updating and deleting multiple DNS records for a name in a single transaction.I noticed that in EIP-1185 the
setDNSRecords(bytes32 node, bytes data)
supports deleting a record if it had no value so I thought we should take advantage of that. I had to manually encode such records since bns doesn't allow empty rdata values.