Invert logic to raise long polling reconnects on the server

- Checking for "/poll" to suppress reconnects does not work since 1.0.*
  clients do not append anything to the URL of poll requests.
- Raising reconnects only  for long polling requests ending with
  "/reconnect" preserves the old server behavior
- This prevents 1.0.* clients from causing a reconnect per poll

#3044
Merge branch 'release' into dev