Imagename is required for commit atm, update manpage
Imagename is required for commit atm, update manpage

Signed-off-by: TomSweeneyRedHat <tsweeney@redhat.com>

Closes: #554
Approved by: rhatdan

nalind/buildah-1,nalind/buildah-1,nalind/buildah-1,rhatdan/buildah,projectatomic/buildah,nalind/buildah,nalind/buildah,TomSweeneyRedHat/buildah,projectatomic/buildah,rhatdan/buildah,rhatdan/buildah,ipbabble/buildah,TomSweeneyRedHat/buildah,TomSweeneyRedHat/buildah,ipbabble/buildah,projectatomic/buildah