Disconnecting node during GetRange makes it never end

[nemanja-boric-sociomantic]

Having two nodes, A and B, disconnecting a single node during running GetRange request, makes GetRange request never end. Same happens if the request uses a single node and it disconnects - the request never ends.

Since the DLS node never resumes the request, disconnecting the client should simply count towards finished nodes. In general, I think we should take this in the careful consideration when implementing the Continue after disconnect - this should not be allowed if the client requested stop.

[nemanja-boric-sociomantic]

Unrelated to the re-connection problem, there's a problem when the node was not available when the request started - the request will wait in the request's connector to connect to the node.