Manually merge release-0_11 into make-errors-public-beta to solve conflict

src/core/census/grpc_filter.c

src/objective-c/GRPCClient/GRPCCall.h

src/objective-c/GRPCClient/GRPCCall.m

src/objective-c/GRPCClient/private/GRPCRequestHeaders.h

src/objective-c/GRPCClient/private/GRPCRequestHeaders.m

src/objective-c/GRPCClient/private/GRPCWrappedCall.h

src/objective-c/GRPCClient/private/GRPCWrappedCall.m

src/objective-c/GRPCClient/private/NSDictionary+GRPC.m

src/objective-c/ProtoRPC/ProtoRPC.m

tools/distpackages/.gitignore

tools/distpackages/build_deb_packages.sh

tools/distpackages/templates/libgrpc-dev/DEBIAN/control

...plates/libgrpc-dev/usr/share/doc/libgrpc-dev/changelog.gz

...templates/libgrpc-dev/usr/share/doc/libgrpc-dev/copyright

tools/distpackages/templates/libgrpc/DEBIAN/control

tools/distpackages/templates/libgrpc/DEBIAN/postinst

tools/distpackages/templates/libgrpc/DEBIAN/postrm

tools/distpackages/templates/libgrpc/DEBIAN/shlibs

...ages/templates/libgrpc/usr/share/doc/libgrpc/changelog.gz

...ackages/templates/libgrpc/usr/share/doc/libgrpc/copyright