Here is v3. I removed CATALOG_VERSION_NO change, so this should be done by the actual commiter.
-- Best regards, Maxim Orlov.
v3-0002-Use-64-bit-multixact-offsets.patch
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v3-0001-Use-64-bit-format-output-for-multixact-offsets.patch
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v3-0003-Make-pg_upgrade-convert-multixact-offsets.patch
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