Changelog for nss-3.28.6-1pclos2017.x86_64.rpm :
Fri Sep 29 14:00:00 2017 bb2 - 3.28.6-1pclos2017
- new version

Sun Apr 23 14:00:00 2017 bb2 3.28.4-2pclos2017
- fix devel package

Sat Apr 22 14:00:00 2017 bb2 3.28.4-1pclos2017
- new version