v0.16.117

Changes

routesrv: reuse skipper.Options (#2416)
Reuse skipper.Options datastructure to avoid duplicate work of adding
the same flags/options to both skipper and routesrv.
Followup on #1873

Docker image

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

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.16.117 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.16.117 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.16.117 skipper --help