Implement the specification changes made in DRIVERS-1707 on the mongos to ensure that network blackholes do not lead to prolonged periods in which queries are waiting for results from nodes that may never come back online. As part of this ticket (which is likely better scoped as a small project), collaborate with the drivers team to understand if DRIVERS-1707 was successful in mitigating customer concerns, and make any tweaks as needed based on their experience.