The package golang-github-jlaffaye-ftp 0.0~git20200812.39e3779-1 has been added to kali-rolling. It has been imported from Debian: https://tracker.debian.org/pkg/golang-github-jlaffaye-ftp -- More information about golang-github-jlaffaye-ftp: http://pkg.kali.org/pkg/golang-github-jlaffaye-ftp