All the go-lint work forced any existing "Uid" -> "UID", but seems to
not have the same rules for Gid, so stat package has calls UID() and
Gid().
Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com> (github: estesp)
This adds the capability to turn on user namespace support when using an
experimental build Docker daemon binary using the `--userns-remap` flag.
Also documentation is added to the experimental docs.
Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com> (github: estesp)