Merge remote-tracking branch 'upstream/master' into service_config

build.yaml

etc/roots.pem

src/core/ext/transport/cronet/transport/cronet_transport.c

src/core/lib/iomgr/udp_server.c

src/core/lib/surface/byte_buffer.c

src/objective-c/GRPCClient/GRPCCall.h

src/objective-c/GRPCClient/GRPCCall.m

src/objective-c/GRPCClient/private/GRPCWrappedCall.h

src/objective-c/GRPCClient/private/GRPCWrappedCall.m

src/objective-c/tests/GRPCClientTests.m

src/ruby/README.md

test/core/iomgr/udp_server_test.c

test/cpp/end2end/proto_server_reflection_test.cc

test/cpp/util/grpc_tool.cc

test/cpp/util/proto_file_parser.cc

test/cpp/util/proto_reflection_descriptor_database.cc

test/cpp/util/proto_reflection_descriptor_database.h

tools/jenkins/reboot_worker.sh

tools/run_tests/sources_and_headers.json

vsprojects/vcxproj/grpc_cli_libs/grpc_cli_libs.vcxproj