Merge branch 'master' of github.com:grpc/grpc into the-ultimate-showdown

Conflicts:
	include/grpc/grpc.h
	src/core/surface/channel.c
	src/core/surface/channel_create.c
	src/core/surface/completion_queue.c
	src/cpp/client/channel.cc
	src/cpp/client/insecure_credentials.cc
	src/csharp/ext/grpc_csharp_ext.c
	src/node/ext/call.cc
	src/node/ext/channel.cc
	src/php/ext/grpc/call.c
	src/php/ext/grpc/channel.c
	src/python/grpcio/grpc/_adapter/_c/types/channel.c
	src/ruby/ext/grpc/rb_channel.c
	test/core/end2end/dualstack_socket_test.c
	test/core/end2end/fixtures/chttp2_fullstack.c
	test/core/end2end/fixtures/chttp2_fullstack_compression.c
	test/core/end2end/fixtures/chttp2_fullstack_uds_posix.c
	test/core/end2end/fixtures/chttp2_fullstack_with_poll.c
	test/core/end2end/multiple_server_queues_test.c
	test/core/end2end/no_server_test.c
	test/core/end2end/tests/bad_hostname.c
	test/core/end2end/tests/cancel_after_accept.c
	test/core/end2end/tests/cancel_after_accept_and_writes_closed.c
	test/core/end2end/tests/cancel_after_invoke.c
	test/core/end2end/tests/cancel_before_invoke.c
	test/core/end2end/tests/cancel_in_a_vacuum.c
	test/core/end2end/tests/census_simple_request.c
	test/core/end2end/tests/disappearing_server.c
	test/core/end2end/tests/early_server_shutdown_finishes_inflight_calls.c
	test/core/end2end/tests/empty_batch.c
	test/core/end2end/tests/graceful_server_shutdown.c
	test/core/end2end/tests/invoke_large_request.c
	test/core/end2end/tests/max_concurrent_streams.c
	test/core/end2end/tests/max_message_length.c
	test/core/end2end/tests/ping_pong_streaming.c
	test/core/end2end/tests/registered_call.c
	test/core/end2end/tests/request_response_with_binary_metadata_and_payload.c
	test/core/end2end/tests/request_response_with_metadata_and_payload.c
	test/core/end2end/tests/request_response_with_payload.c
	test/core/end2end/tests/request_response_with_payload_and_call_creds.c
	test/core/end2end/tests/request_response_with_trailing_metadata_and_payload.c
	test/core/end2end/tests/request_with_compressed_payload.c
	test/core/end2end/tests/request_with_flags.c
	test/core/end2end/tests/request_with_large_metadata.c
	test/core/end2end/tests/request_with_payload.c
	test/core/end2end/tests/server_finishes_request.c
	test/core/end2end/tests/simple_delayed_request.c
	test/core/end2end/tests/simple_request.c
	test/core/end2end/tests/simple_request_with_high_initial_sequence_number.c
	test/core/fling/client.c
	test/core/fling/server.c
	test/core/surface/lame_client_test.c