close: vesoft-inc#4955

Now it should support dual stack for some friends in community.
This roughly change is targeted to create a branch for their
quick testing on IPv6 only env(that doesnt come with a DNS)

Note intToIPv4 is not handled due to it's probabbly for metad
of NebulaGraph v1 only.

export CPPLINT_EXTENS=cpp,h
export CPPLINT_FILTER=-whitespace/indent,-build/include_what_you_use,-readability/todo,-build/include,-build/header_guard,-runtime/references,-build/c++11

.linters/cpp/cpplint.py --quiet --extensions=$CPPLINT_EXTENS \
                --filter=$CPPLINT_FILTER --linelength=100 src/common/network/NetworkUtils.cpp

patch.diff from formatter
cd src
git apply --reject --whitespace=fix ../patch.diff

it turned out this case should be resolved properly in
running env, as it's not a mock call. Thus we remove it.