containers.conf: document compat_api_enforce_docker_hub

Mention it in the man page.

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

Author: vrothberg

docs/containers.conf.5.md

@@ -422,6 +422,12 @@ Name of destination for accessing the Podman service. See SERVICE DESTINATION TA
 The cgroup management implementation used for the runtime. Supports `cgroupfs`
 and `systemd`.
 
+**compat_api_enforce_docker_hub**=true
+
+Enforce using docker.io for completing short names in Podman's compatibility
+REST API. Note that this will ignore unqualified-search-registries and
+short-name aliases defined in containers-registries.conf(5).
+
 **conmon_env_vars**=[]
 
 Environment variables to pass into Conmon.

pkg/config/containers.conf

@@ -376,6 +376,11 @@ default_sysctls = [
 #
 #active_service = "production"
 
+# Enforces using docker.io for completing short names in Podman's compatibility
+# REST API. Note that this will ignore unqualified-search-registries and
+# short-name aliases defined in containers-registries.conf(5).
+#compat_api_enforce_docker_hub = true
+
 # The compression format to use when pushing an image.
 # Valid options are: `gzip`, `zstd` and `zstd:chunked`.
 #