Currently, the mongo/util/net/network library is the dependency needed to satisfy both dependencies on the core messages types like message and OpMsg and dependencies on the SSLManager and related types.

However, some subsystems may have no need to depend on SSL related code, but still want to manipulate message types.

This is primarily in furtherance of reducing the dependency set for the embedded library, which needs to know about Message, but shouldn't need anything SSL related.