[Piuparts-reports] Cron <piupartsm at pejacevic> rotate_master_logs

[Cron Daemon]

stretch-security/master.20170920.log: 46.8 KiB / 1029.5 KiB = 0.045
'stretch-pu/master.log' -> 'stretch-pu/master.20170921.log'
jessie2Xstretch-rcmd/master.20170920.log: 67.8 KiB / 1087.4 KiB = 0.062