I just stumbled on this question How to do UDP Transmission on ENC28J60?
which asks advice about a software library. I wanted to flag the question as off topic, and noticed a nice reason "this question belongs to another stack exchange site". I happily clicked it, but there were only two choices and none was correct, so I renounced (but I've made a comment) because I didn't want to say "this is blatantly out of topic". Or instead it is?
One of the options was "super user", nice, but I think "stack overflow" should be added. Am I right in thinking so? Can we have this handy shortcut?