The mongos server parameters defined here were meant to be linked only into mongos. They are also linked into mongod.

To complicate things, each of the parameters is used in a "hot" area of mongod/mongos cross-linkage, such as async_requests_sender.cpp and sharding_initialization.cpp.

We will need to assess the complications that arise from having these parameters caught in the mongod/mongos cross-link web, and whether setting the parameter on mongod causes odd behavior in a sharded cluster.