forgot to commit openos

data/openos/bin/unset.lua

@@ -0,0 +1,9 @@
+local args = {...}
+
+if #args < 1 then
+  io.write("Usage: unset <varname>[ <varname2> [...]]\n")
+else
+  for _, k in ipairs(args) do
+    os.setenv(k, nil)
+  end
+end