Man: add --enable-metrics and --metrics-port.
Man: add --enable-metrics and --metrics-port.

Signed-off-by: François Cami <a395e1e7cabc356df371463d10a4f0b2ac1f367e@fedoraproject.org>

kubernetes-incubator/ocid,nalind/cri-o,rhatdan/cri-o,mikebrow/cri-o,nalind/cri-o,mikebrow/cri-o,kubernetes-incubator/cri-o,kubernetes-incubator/ocid,kubernetes-incubator/ocid,kubernetes-incubator/cri-o,mikebrow/cri-o,kubernetes-incubator/cri-o,nalind/cri-o,kubernetes-incubator/cri-o,rhatdan/cri-o,rhatdan/cri-o,mikebrow/cri-o,rhatdan/cri-o