Also make the script fetch protoc from the usual place.

C++ Compression Level set properly

-Rename namespace to grpc_health->grpc to match spec
-Proper use of NOT_FOUND status code
-Improve testing
-Add source distribution to artifact build

The two log.h can’t be listed, though, as they include the nefarious
<inttypes.h> (See discussing at BoringSSL.podspec). Not listing them
seems to be alright, though.

streaming (sync and async) APIs

Remove range-based fors

signal number

2.9 and above

groundwork for adding API that allows users to register custom kick
signal number