c9f1050226
Tested using global-net-plugin-ipc which sets PidHost in config.json. Plugins might need access to host pid namespace. Add support for that. Tested using aragunathan/global-net-plugin-ipc which sets "pidhost" in config.json. Observed using `readlink /proc/self/ns/pid` that plugin and host have the same ns. Signed-off-by: Anusha Ragunathan <anusha.ragunathan@docker.com>