add a TODO

src/libnss.zig

@@ -95,6 +95,7 @@ fn init() void {
     const verbose = false;
     const omit_members = false;
 
+    // TODO: neither getenvZ nor os.argv work as expected on a shared library.
     //const omit_members = if (os.argv.len == 0)
     //    false
     //else