Document that you can only listen on an already closed socket

[gibfahn]

• Subsystem: doc

From #8419 (comment),

@addaleax raised a possible concern with #8294 which states in the docs that you can listen() on the same socket multiple times. It should probably say more clearly that you can only listen() on an already closed socket.

EDIT: PR raised: https://github.com/nodejs/node/pull/13149/files

[joyeecheung]

Since listen() is overloaded it might help even more to point out what happens if you call listen() on different stuff multiple times..

Also I think listen() doesn't actually raise an error when you try to listen on an unbound handle?

[eduardbme]

will do

[gibfahn]

@eduardbcom if you're going to fix this (either in #8419 or a separate PR) then if you could add the Fixes: line to the commit and link to it from here that'd be great!

Fixes: https://github.com/nodejs/node/issues/11685#issuecomment-284221748