add version

works/patch/cmd/sing-box/cmd_version.go.patch

@@ -0,0 +1,12 @@
+--- a/cmd/sing-box/cmd_version.go
++++ b/cmd/sing-box/cmd_version.go
+@@ -30,6 +30,9 @@
+ 		return
+ 	}
+ 	version := "sing-box version " + C.Version + "\n\n"
++	// OMV start: add omv label
++	version += "O.M.V. 帝江号\n\n"
++	// OMV end
+ 	version += "Environment: " + runtime.Version() + " " + runtime.GOOS + "/" + runtime.GOARCH + "\n"
+ 
+ 	var tags string