napalm-device-types 2.6.0 opens a host's container engine through
`open_container_engine()`, and asks the driver for the binary through
`_container_engine_binary()`. Under QTS docker is not on PATH; the hook
now returns the path `open()` already discovers, so the Engine API stream
(`<path> system dial-stdio`) and the CLI reach Container Station while
callers only pass arguments (NetOrk/netork#765).
Version 0.2.0, requires napalm-device-types >= 2.6.0 and
napalm-linux >= 0.2.0.
Refs NAPALM/napalm-device-types#17