I've finished porting all the libnickel patches. Here they are (all of them are enabled by default for testing):
https://github.com/geek1011/kobopatc....so.1.0.0.yaml
The SHA256 checksum of libnickel should be: 43c25f16d596076d1926822d6ce6848dc298b81dbf8b3c8071 7325d3df8cc999
Please test it and tell me if it does not match.