FreeBSD doesn't have "bind" mount, but nullfs might be a similar feature.
However nullfs can mount only directories.
Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
Upstream-commit: ca7a0e6d6e31c02baf692315d2481ef35a7e9134
Component: engine