Add info to Mount a Host File as a Data Volume

Docker-DCO-1.1-Signed-off-by: Tom Fotherby <github@tomfotherby.com> (github: tomfotherby)
Update File mount info for docker v1.1.0

Docker-DCO-1.1-Signed-off-by: Tom Fotherby <github@tomfotherby.com> (github: tomfotherby)
Reformat to keep line length within 80 characters

Docker-DCO-1.1-Signed-off-by: Tom Fotherby <github@tomfotherby.com> (github: tomfotherby)
Typo fix

Docker-DCO-1.1-Signed-off-by: Tom Fotherby <github@tomfotherby.com> (github: tomfotherby)
Tiny text reformat (as per review comments)

Docker-DCO-1.1-Signed-off-by: Tom Fotherby <github@tomfotherby.com> (github: tomfotherby)
Merge pull request #6854 from tomfotherby/patch-1

Add documention on how to Mount a Host File as a Data Volume