Fix some mistakes in dockerd.md

Signed-off-by: Wang Xing <hzwangxing@corp.netease.com>

daemon/config.go

@@ -88,7 +88,7 @@ type CommonConfig struct {
 	Root                 string              `json:"graph,omitempty"`
 	SocketGroup          string              `json:"group,omitempty"`
 	TrustKeyPath         string              `json:"-"`
-	CorsHeaders          string              `json:"api-cors-headers,omitempty"`
+	CorsHeaders          string              `json:"api-cors-header,omitempty"`
 	EnableCors           bool                `json:"api-enable-cors,omitempty"`
 
 	// ClusterStore is the storage backend used for the cluster information. It is used by both

daemon/config_unix.go

@@ -41,7 +41,7 @@ type bridgeConfig struct {
 	EnableIPv6                  bool   `json:"ipv6,omitempty"`
 	EnableIPTables              bool   `json:"iptables,omitempty"`
 	EnableIPForward             bool   `json:"ip-forward,omitempty"`
-	EnableIPMasq                bool   `json:"ip-mask,omitempty"`
+	EnableIPMasq                bool   `json:"ip-masq,omitempty"`
 	EnableUserlandProxy         bool   `json:"userland-proxy,omitempty"`
 	DefaultIP                   net.IP `json:"ip,omitempty"`
 	IP                          string `json:"bip,omitempty"`

docs/reference/commandline/dockerd.md

@@ -925,7 +925,7 @@ This is a full example of the allowed configuration options in the file:
 	"tlscacert": "",
 	"tlscert": "",
 	"tlskey": "",
-	"api-cors-headers": "",
+	"api-cors-header": "",
 	"selinux-enabled": false,
 	"userns-remap": "",
 	"group": "",
@@ -934,7 +934,7 @@ This is a full example of the allowed configuration options in the file:
 	"ipv6": false,
 	"iptables": false,
 	"ip-forward": false,
-	"ip-mask": false,
+	"ip-masq": false,
 	"userland-proxy": false,
 	"ip": "0.0.0.0",
 	"bridge": "",