The following is a bit of a corner case, but I think it's related to an issue we've seen in practice (if you e.g. have a mongod which is still bound to a port but not actually accept()ing connections). Steps to reproduce:

• Run a netcat:
  $ nc -lk localhost 7000
• Use that netcat as the first node in your replica set:
  >> m = Mongo::ReplSetConnection.new(['127.0.0.1', 7000], ['127.0.0.1', 6001])
• This will hang forever.
• That's fine; set a :connect_timeout. Still hangs forever because under the hood, it's doing a read from the netcat session to learn about the cluster config.
• Set an :op_timeout. An exception is raised (in particular, the next seed node is not tried).

Is there an option for this case I'm missing? It seems like it might be worth making :connect_timeout be applicable until the connection instantiation has completed.