docker import: Need a -c example

[johndmulhausen]

@kitplummer commented on Thu Mar 16 2017

File: engine/reference/commandline/import.md

Need a -c example - how does the change list work?

[adeniyistephen]

@johndmulhausen and @dnephin Hi, is this issue still open? I would love to give an example

[thaJeztah]

closing as duplicate of #169 - I think I have some changes in a local branch to improve