not an issue but some questions which should be written with documentation

[ytrezq]

Does it support ipv6?
Does it support zone transfers (AXFR)?

[antirez]

Sorry this code is totally abandonware. It was used in production by some site and got even embedded into routers a decade ago or more, but it is no longer usable without a major reshape. So I put the code on Github just as historical things I used to write, to lower the probability of me losing the code.