GitLab

* Enforce minimal varint encoding when decoding multiaddrs.
* Ensure codecs fit in 32bit integers for compatibility. We can increase the
size, but we'd need to change the `Protocol.Codec` type from `int` to `uint64`.

fixes #104

This includes the bad multiaddr in the error and should improve UX (see
https://github.com/ipfs/go-ipfs/issues/4190).

Reduces confusion due to aliased protocol names.

License: MIT
Signed-off-by: Matt Joiner <anacrolix@gmail.com>

This adds a `Component` helper type and a `ForEach` helper method.

The first attempt used an interface but interfaces imply allocation. We really
can't afford to allocate here.

This showed up when profile go-ipfs.

This is checked when the protocol is *registered*. There's no reason to test it
twice.

Otherwise, .String() can panic.

Instead of having the transformers deal with variable length argument prefixes,
just do this in the bytesToString/stringToBytes functions.

Allowing multiaddr extensions to have data with