gRPC-go release 1.8.0

[Menghan Li]

​​gRPC-go 1.8.0 is now released. Full release notes:

Dependencies

• Re-add support for Go1.6 (#1603)

API Changes

• Add functions to ClientConn so it satisfies an interface for generated code (#1599)

Behavior Changes

• ClientHandshake should get the dialing endpoint as the authority (#1607)

New Features

• Switch balancer based on service config info (#1670)
• server: apply deadline to new connections until all handshaking is completed (#1646)
• Implement transparent retries for gRFC A6 (#1597)
• Get method string from stream (#1588)
• Register and use default balancers and resolvers (#1551)
• Make passthrough resolver the default instead of dns (#1606)
• Parse ServiceConfig JSON string (#1515)

Performance Improvements

• Speed-up quota pools. (#1636)
• Acquire all stream related quota and cache it locally since no more than one write can happen in parallel on stream (#1614)

Bug Fixes

• Add proper support for 'identity' encoding type (#1664)
• Remove self-imposed limit on max concurrent streams if the server doesn't impose any. (#1624)
• Fix parseTarget for unix socket address without scheme (#1611)
• Fix connectivity state transitions when dialing (#1596)
• Update go_package declarations (#1593)
• Eliminate race on ac.acbw (#1666)
• addrConn: set ac.state to TransientFailure upon non-temporary errors (#1657)
• Check ac state shutdown before setting it to TransientFailure (#1643)
• Fix settings ack race (#1630)
• Cap max msg size to min(max_int, max_uint32) (#1598)
• Fix max msg size type issues on different arch (#1623)
• Serve() should not return error on Stop() or GracefulStop() (#1485)

Documentation

• Create versioning and release policy document (#1583)
• Corrected documentation on Server.Serve (#1668)
• Update picker doc when returned SubConn is not ready (#1659)
• balancer: reduce chattiness (#1608)
• Update fail fast documentation to remove retry language (#1586)

Please see release at: https://github.com/grpc/grpc-go/releases/tag/v1.8.0