Allows servers to expedite shutdown once all in-progress calls are
completed. We may want to eventually remove grpc_server_shutdown in
preference to this.
Actually exposing it from the C API.
Also removing grpc_status, since it's mostly useless.
Change on 2014/12/15 by ctiller <ctiller@google.com>
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=82180546