Rebase & update api doc v1.18 instead

Signed-off-by: harry zhang <resouer@163.com>

api/server/server_linux.go

@@ -27,7 +27,7 @@ func NewServer(proto, addr string, job *engine.Job) (Server, error) {
 }
 
 func setupUnixHttp(addr string, job *engine.Job) (*HttpServer, error) {
-    r := createRouter(job.Eng, job.GetenvBool("Logging"), job.GetenvBool("EnableCors"), job.Getenv("CorsHeaders"), job.Getenv("Version"))
+	r := createRouter(job.Eng, job.GetenvBool("Logging"), job.GetenvBool("EnableCors"), job.Getenv("CorsHeaders"), job.Getenv("Version"))
 
 	if err := syscall.Unlink(addr); err != nil && !os.IsNotExist(err) {
 		return nil, err

daemon/config.go

@@ -69,7 +69,7 @@ func (config *Config) InstallFlags() {
 	flag.BoolVar(&config.EnableSelinuxSupport, []string{"-selinux-enabled"}, false, "Enable selinux support")
 	flag.IntVar(&config.Mtu, []string{"#mtu", "-mtu"}, 0, "Set the containers network MTU")
 	flag.StringVar(&config.SocketGroup, []string{"G", "-group"}, "docker", "Group for the unix socket")
-	flag.BoolVar(&config.EnableCors, []string{"#api-enable-cors", "#-api-enable-cors"}, false, "Enable CORS headers in the remote API")
+	flag.BoolVar(&config.EnableCors, []string{"#api-enable-cors", "#-api-enable-cors"}, false, "Enable CORS headers in the remote API, this is deprecated by --api-cors-header")
 	flag.StringVar(&config.CorsHeaders, []string{"-api-cors-header"}, "", "Set CORS headers in the remote API")
 	opts.IPVar(&config.DefaultIp, []string{"#ip", "-ip"}, "0.0.0.0", "Default IP when binding container ports")
 	opts.ListVar(&config.GraphOptions, []string{"-storage-opt"}, "Set storage driver options")

docs/sources/reference/api/docker_remote_api_v1.17.md

@@ -1971,4 +1971,4 @@ This might change in the future.
 To set cross origin requests to the remote api, please add flag "--api-enable-cors"
 when running docker in daemon mode.
 
-    $ docker -d -H="192.168.1.9:2375" --api-cors-header="http://foo.bar"
+    $ docker -d -H="192.168.1.9:2375" --api-enable-cors 

docs/sources/reference/api/docker_remote_api_v1.18.md

@@ -1975,7 +1975,8 @@ This might change in the future.
 
 ## 3.3 CORS Requests
 
-To enable cross origin requests to the remote api add the flag
-"--api-enable-cors" when running docker in daemon mode.
+To set cross origin requests to the remote api please give values to 
+"--api-cors-header" when running docker in daemon mode. Set * will allow all,
+default or blank means CORS disabled
 
-    $ docker -d -H="192.168.1.9:2375" --api-enable-cors
+    $ docker -d -H="192.168.1.9:2375" --api-cors-header="http://foo.bar"