Since `tor` and `i2p` are features, dependents may compile the
`radicle` crate without these features and will not be able to parse
`AddressType`.
Allow parsing of the `AddressType` to fail, and skip if that is the
case.
Further, the same holds for `Address`, and skip if that fails to parse
as well.
Finally, `Address` may parse an address string successfully to
`HostName`, but it may have an `AddressType` that does not match the
`HostName` variant. Guard against this, again skipping if they are not
equal.
For example, `HostName::Dns` is a `String` underneath, so there is
higher chance that something like `deadbeef.onion` parses to this
variant.
704b6cdabb