The package golang-github-gorilla-securecookie 1.1+git20170224.6.e59506c-4 has been added to kali-rolling. It has been imported from Debian: https://tracker.debian.org/pkg/golang-github-gorilla-securecookie -- More information about golang-github-gorilla-securecookie: http://pkg.kali.org/pkg/golang-github-gorilla-securecookie