Calling this function is deprecated because modules that consult it cannot engage in an orderly, coordinated shutdown. Instead, such modules tend to just stop working at some point after mongo::shutdown() is invoked, without regard to whether modules that depend on them have already shut down.

As such, for clarity, this patch renames the function from mongo::inShutdown() to mongo::globalInShutdownDeprecated(). This also helps disambiguate calls to this function from calls to individual components' similarly named functions.