From https://github.com/urfave/cli/pull/1383 :
> This removes the resulting binary dependency on cpuguy83/md2man and
> russross/blackfriday (and a few more packages imported by those),
> which saves more than 400 KB (more than 300 KB
> once stripped) from the resulting binary.
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>