We have a race when multiple clients connect to ThinLinc at the same time and they share the same user account. What can happen is: 1. Client A connects to vsmserver and lists sessions 2. No disconnected session is found, so "newsession" is called 3. A new session is created and client A gets the connection details 4. Client B connects to vsmserver and lists sessions 5. The new session is detected as disconnected as client A hasn't had time to connect to it yet 6. Client B calls "reconnect_session" and gets the connection details 7. Both clients will attempt to connect, but the first to succeed will be disconnected when the second connects (the same thing can happen with "reconnect_session" in step 2, with two clients fighting for the same disconnected session) We probably need to have some grace period to give the requesting client some time to connect.
