forked from espressif/esp-idf
lwip: Reference official 2.1.3-esp branch
Actual changes against 2.1.3-esp-dev: * Fix IPv6 zoning violations * Melted on-demand timer's commits into one
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Actual changes against 2.1.3-esp-dev: * Fix IPv6 zoning violations * Melted on-demand timer's commits into one