Add support for setting relativeurls registry config.
After an upgrade from Openshift 3.9 to 3.11 we have encountered unknown blob errors when pushing to the gitlab registry.
Found a similar issue from the harbor project https://github.com/goharbor/harbor-helm/issues/174 which was resolved by setting relativeurls: true
in the http config of the registry.
Setting this via the REGISTRY_HTTP_RELATIVEURLS=true
environment variable on the registry deployment has resolved the issue for us now and this PR adds support for setting this configuration in config.yml.
similar to: https://github.com/goharbor/harbor-helm/pull/271