merged

BUILD

CMakeLists.txt

Makefile

build.yaml

composer.json

doc/PROTOCOL-HTTP2.md

doc/core/pending_api_cleanups.md

doc/cpp/pending_api_cleanups.md

doc/environment_variables.md

etc/roots.pem

examples/node/static_codegen/greeter_client.js

examples/php/composer.json

include/grpc++/ext/reflection.pb.h

include/grpc++/impl/codegen/client_context.h

include/grpc/impl/codegen/grpc_types.h

src/compiler/php_generator.cc

src/compiler/php_generator.h

src/compiler/php_generator_helpers.h

src/compiler/php_plugin.cc

src/core/ext/client_config/client_channel.c