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ca58f8029c
The functionality is available through `Multiaddr::replace`. What we currently call "nat_traversal" is merley a replacement of an IP address prefix in a `Multiaddr`, hence it can be done directly on `Multiaddr` values instead of having to go through a `Transport`. In addition this PR consolidates changes made to `Multiaddr` in previous commits which resulted in lots of deprecations. It adds some more (see below for the complete list of API changes) and removes all deprecated functionality, requiring a minor version bump. Here are the changes to `multiaddr` compared to the currently published version: 1. Removed `into_bytes` (use `to_vec` instead). 2. Renamed `to_bytes` to `to_vec`. 3. Removed `from_bytes` (use the `TryFrom` impl instead). 4. Added `with_capacity`. 5. Added `len`. 6. Removed `as_slice` (use `AsRef` impl instead). 7. Removed `encapsulate` (use `push` or `with` instead). 8. Removed `decapsulate` (use `pop` instead). 9. Renamed `append` to `push`. 10. Added `with`. 11. Added `replace`. 12. Removed `ToMultiaddr` trait (use `TryFrom` instead).