v0.16.124

Changes

Introduce lockedSource type to avoid concurrent use of rand.Source (#2412)
There're no single write to those slices and there is no performance effect
from using them.

Docker image

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

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.16.124 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.16.124 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.16.124 skipper --help