Commit dd28ded711417c72d2e228d1ace129ac5fd05f19 brought in new networking features and API, but did not document the available IPAM options. This adds a description of those options. Signed-off-by: Sebastiaan van Stijn <github@gone.nl> Upstream-commit: d69fce79f94b807ccb0f2f64c47881ee8fc31250 Component: engine