Add support for HttpProxy key in quadlet Container sections to control
proxy environment variable inheritance during image pulls and builds.
- HttpProxy=true enables proxy inheritance (default podman behavior)
- HttpProxy=false disables proxy inheritance
- When omitted, uses podman's default behavior
This addresses the need for declarative proxy configuration in IPv6-only
networks and other scenarios where proxy settings need to be controlled
at the container level without manual workarounds.
Fixes#26925
Signed-off-by: Ondřej Gajdušek <ogajduse@redhat.com>
c65fd9a2c2