Upgrade RKHunter to the newest version of GIT

[nasatome]

Rootkit Hunter release 1.4.6 (February 20th 2018)

https://sourceforge.net/p/rkhunter/rkh_code/ci/develop/tree/

Last Commit: 2019-09-19 For servers that are not in production

And installation guide for this

[nasatome]

git clone https://git.code.sf.net/p/rkhunter/rkh_code rkhunter-rkh_code

This is gonna help.