Update daemon docs and help messages for --iptables and --ip-forward

Fix docs and help messages of --iptables and --ip-forward to describe the true case behaviour

Docker-DCO-1.1-Signed-off-by: Ken ICHIKAWA <ichikawa.ken@jp.fujitsu.com> (github: ichik1)

docker/docker.go

@@ -35,8 +35,8 @@ func main() {
 		flSocketGroup        = flag.String([]string{"G", "-group"}, "docker", "Group to assign the unix socket specified by -H when running in daemon mode; use '' (the empty string) to disable setting of a group")
 		flEnableCors         = flag.Bool([]string{"#api-enable-cors", "-api-enable-cors"}, false, "Enable CORS headers in the remote API")
 		flDns                = opts.NewListOpts(opts.ValidateIp4Address)
-		flEnableIptables     = flag.Bool([]string{"#iptables", "-iptables"}, true, "Disable docker's addition of iptables rules")
-		flEnableIpForward    = flag.Bool([]string{"#ip-forward", "-ip-forward"}, true, "Disable enabling of net.ipv4.ip_forward")
+		flEnableIptables     = flag.Bool([]string{"#iptables", "-iptables"}, true, "Enable Docker's addition of iptables rules")
+		flEnableIpForward    = flag.Bool([]string{"#ip-forward", "-ip-forward"}, true, "Enable net.ipv4.ip_forward")
 		flDefaultIp          = flag.String([]string{"#ip", "-ip"}, "0.0.0.0", "Default IP address to use when binding container ports")
 		flInterContainerComm = flag.Bool([]string{"#icc", "-icc"}, true, "Enable inter-container communication")
 		flGraphDriver        = flag.String([]string{"s", "-storage-driver"}, "", "Force the docker runtime to use a specific storage driver")

docs/sources/reference/commandline/cli.rst

@@ -80,8 +80,8 @@ Commands
       -g, --graph="/var/lib/docker": Path to use as the root of the docker runtime
       --icc=true: Enable inter-container communication
       --ip="0.0.0.0": Default IP address to use when binding container ports
-      --ip-forward=true: Disable enabling of net.ipv4.ip_forward
-      --iptables=true: Disable docker's addition of iptables rules
+      --ip-forward=true: Enable net.ipv4.ip_forward
+      --iptables=true: Enable Docker's addition of iptables rules
       --mtu=0: Set the containers network MTU; if no value is provided: default to the default route MTU or 1500 if not default route is available
       -p, --pidfile="/var/run/docker.pid": Path to use for daemon PID file
       -r, --restart=true: Restart previously running containers