Version v9.4.0-rc.2 - Warn on archiving git directory !591 - Use Go 1.8 for CI !620 - Add CacheClient with timeout configuration for cache operations !608 - Remove '.git/hooks/post-checkout' hooks when using fetch strategy !603 - Update linux-repository.md !624 - Fix VirtualBox and Parallels executors registration bugs !589 - Support Kubernetes PVCs !606 - Support cache policies in .gitlab-ci.yml !621 - Improve kubernetes volumes support !625 - Fix incorrect substitute example in hostname in docker.md !627 - Fix typo in debug !630 - Adds an option `--all` to unregister command !622 - Add the techical description of version release !631 - Update documentation on building docker images inside of a kubernetes cluster. !628 - Support for extended docker configuration in gitlab-ci.yml !596