fix bad interaction between nickTimer.Stop() and accounts.Logout()
fix bad interaction between nickTimer.Stop() and accounts.Logout()

Sequence of events:

1. client.nickTimer.Stop()
2. client.server.accounts.Logout(client)
3. accounts sees that client is no longer logged in, does client.nickTimer.Touch()
4. 30 seconds later, RandomlyRename resurrects the zombie client

oragono/oragono,DanielOaks/oragono,oragono/oragono,oragono/oragono,DanielOaks/oragono