v0.16.58

Changes

predicates: add TrafficSegment predicate (#2287)
This change adds routing context to pass information between multiple
predicates and uses it to implement new TrafficSegment predicate.
For #2268

Docker image

Docker image is available in Zalando's Open Source registry:

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.16.58 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.16.58 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.16.58 skipper --help