Get a list of all created Sockets

[mlucool]

You want to:

• [x] request a feature

Expected behaviour

There should be a global function to get a list of all created Sockets (where socket refers back to the thing io returns and not a thing that is wrapped by a manager). This is useful if you want to take action on all of them. My guess is this list is somewhere within the lib already and just needs to be exposed.