Changes:

• Make MDNS the default registry
• Move mocks to be memory implementations
• Add metadata.Copy function

MDNS becomes the default registry. If you're using consul specify --registry=consul or MICRO_REGISTRY=consul

BREAKING CHANGES

Codec

Do not move to this tag unless you're willing to incur the breaking changes.
This changes the default codec to raw protobuf and switches the content-type
application/octet-stream to use the bytes codec also. This breaking change
affects any previous use.

To explicitly be backwards compatible do the following.

In the server

// Process octet-stream as proto-rpc in the old ways
server.DefaultCodecs["application/octet-stream"] = protorpc.NewCodec
// Process json in the old way
server.DefaultCodecs["application/json"] = jsonrpc.NewCodec
// Process protobuf in the old way
server.DefaultCodecs["application/protobuf"] = protorpc.NewCodec

In the client

// In the client send proto-rpc to be forwards compatible
client.DefaultContentType = "application/proto-rpc"

There are changes to application/json and application/protobuf to use raw formats
rather than json-rpc or proto-rpc. This will likely break behaviour via the api.
The easiest way to resolve this is to reset these as well but it causes further issue.

I would advise finding a common rolling path forward e.g a common compatible content-type/codec.

This is an unfortunate change that has to be made so we can process raw formats.

Endpoint

Method now moves to endpoint. In most places we have Endpoint specified except in the client/server abstractions.
This has now moved. Most should be unaffected. But be aware of the change. Any wrappers may break.

• Offline inbox for http broker
• JSON/Proto/GRPC codec
• HTTP proxy from environment

• Fix cache/gossip data race
• Rename cache selector to registry

• Selector cache lookup optimization

• Public NewSubscribeOptions
• http2 broker support
• Timeout error function
• Consul Query Options
• Gossip registry
• RPC Codec renaming

• bug fix for socket headers

• add local/remote ip methods
• various linting things
• get checks on 0 ttl
• accept loop

• Fix broker locking
• Add RetryOnError as default retry policy
• Fix mock client reflection
• Support dialtimeout only above 0
• Add verbose client errors
• Allow client retries to be 0

• Reset server address on shutdown
• Set default pool size to 1
• Support reinitialising connection pool
• Set retries to 1 by default
• Return error for subscribers

• Rework of interfaces

This release introduces breaking changes in some go-micro interfaces

• Move misc to util package
• Add register ttl and interval flags
• Fix protoc-gen-micro example

• Add consul TCP check
• Atomic increment rpc stream sequence

• Support consul services without version
• Switch to stdlib context

• Add WatchOption which allows filtering by service
• Add Options method to registry
• Add Conflict error
• Only watch selected services in cache

• https support for consul registry
• subscriber deadlock bug fix
• selector top level option for service