Merge pull request #11237 from y-zeng/srv_record

BUILD

CMakeLists.txt

Makefile

binding.gyp

build.yaml

config.m4

config.w32

gRPC-Core.podspec

grpc.gemspec

package.xml

...rs/client_channel/resolver/dns/c_ares/dns_resolver_ares.c

.../client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h

...t_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c

...rs/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.c

...rs/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h

..._channel/resolver/dns/c_ares/grpc_ares_wrapper_fallback.c

src/core/lib/iomgr/ev_epollsig_linux.c

src/python/grpcio/grpc_core_dependencies.py

...client_channel/resolvers/dns_resolver_connectivity_test.c

test/core/client_channel/resolvers/dns_resolver_test.c