Merge remote-tracking branch 'upstream/master'

Makefile

include/grpc++/server.h

include/grpc/support/alloc.h

include/grpc/support/atm_win32.h

include/grpc/support/port_platform.h

include/grpc/support/slice.h

src/core/compression/message_compress.c

src/core/statistics/census_log.c

src/core/support/alloc.c

src/core/support/cpu_linux.c

src/core/support/cpu_posix.c

src/core/support/string.c

src/core/tsi/ssl_transport_security.c

src/cpp/server/server.cc

src/node/ext/credentials.cc

src/node/interop/messages.proto

src/node/src/client.js

src/python/src/grpc/_adapter/rear.py

src/ruby/ext/grpc/rb_credentials.c

src/ruby/spec/generic/active_call_spec.rb