ipam/host-local: add ResolvConf argument for DNS configuration
ipam/host-local: add ResolvConf argument for DNS configuration

This adds the option `resolvConf` to the host-local IPAM configuration.
If specified, the plugin will try to parse the file as a resolv.conf(5)
type file and return it in the DNS response.

squeed/plugins,containernetworking/plugins,containernetworking/plugins,squeed/plugins