If a label for a domain gets locked once, the domain will never be able to be claimed in DNSRegistrar.sol, since there's no method to unlock a label

Lines of code Vulnerability details Proof of Concept When claiming a domain in DNSRegistrar.sol either through proveAndClaim or proveAndClaimWithResolver, the internal function enableNode will be called. The snippet bellow shows that when owner == address0 or owner == previousRegistrar and...