Improve the docker version output

commands.go

@@ -183,10 +183,14 @@ func (srv *Server) CmdWait(stdin io.ReadCloser, stdout io.Writer, args ...string
 
 // 'docker version': show version information
 func (srv *Server) CmdVersion(stdin io.ReadCloser, stdout io.Writer, args ...string) error {
-	fmt.Fprintf(stdout, "Version:%s\n", VERSION)
-	fmt.Fprintf(stdout, "Git Commit:%s\n", GIT_COMMIT)
-	if NO_MEMORY_LIMIT {
-		fmt.Fprintf(stdout, "Memory limit disabled\n")
+	fmt.Fprintf(stdout, "Version: %s\n", VERSION)
+	fmt.Fprintf(stdout, "Git Commit: %s\n", GIT_COMMIT)
+	fmt.Fprintf(stdout, "Kernel: %s\n", srv.runtime.kernelVersion)
+	if !srv.runtime.capabilities.MemoryLimit {
+		fmt.Fprintf(stdout, "WARNING: No memory limit support\n")
+	}
+	if !srv.runtime.capabilities.SwapLimit {
+		fmt.Fprintf(stdout, "WARNING: No swap limit support\n")
 	}
 	return nil
 }