Add support to boot from plan9k filesystems

util/OpenOS/config.d/02_plan9k.lua

@@ -0,0 +1,12 @@
+local cfgadd = ...
+local comp = require("component")
+for fs in comp.list("filesystem") do
+	if comp.invoke(fs, "getLabel") == "Plan9k" and comp.invoke(fs, "exists", "init.lua") then
+		print("Plan9k discovered on "..fs)
+		cfgadd(string.format([[
+menu.add("Plan9k on %s", function()
+	return loadmod("loader_openos")("%s")
+end)
+]], fs:sub(1, 3), fs))
+	end
+end