Merge branch '0bug' into timer_pool

include/grpc/impl/codegen/grpc_types.h

src/core/ext/filters/client_channel/client_channel.c

src/core/ext/filters/client_channel/lb_policy.h

...core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c

src/core/lib/http/httpcli.c

...thon/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi

src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi

src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi

test/core/end2end/cq_verifier.c

test/cpp/client/credentials_test.cc

test/cpp/end2end/grpclb_end2end_test.cc

tools/internal_ci/linux/grpc_fuzzer_api.cfg

tools/internal_ci/linux/grpc_fuzzer_api.sh

tools/internal_ci/linux/grpc_fuzzer_client.cfg

tools/internal_ci/linux/grpc_fuzzer_client.sh

tools/internal_ci/linux/grpc_fuzzer_hpack_parser.cfg

tools/internal_ci/linux/grpc_fuzzer_hpack_parser.sh

tools/internal_ci/linux/grpc_fuzzer_http_request.cfg

tools/internal_ci/linux/grpc_fuzzer_http_request.sh

tools/internal_ci/linux/grpc_fuzzer_json.cfg