I got unexpected behavior of atop's cron's sript installed into /etc/cron.d - it don't work.
After investigating I see that ebuild patch installed cron's script(cut of user from scrip should be started). As I understand problem related only to vixie-cron.
I have try to fix it. Now I will attach my solution.
Created attachment 203586 [details, diff]
not a regression
vixie-cron is slated for removal. Does this apply to other cron implementations in Gentoo?