example.ini: give more details on handling certificate chain

3 jobs for v2.1-acme-draft-16 in 10 minutes and 9 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #465
jessie

00:03:34

88.0%
passed #466
jessie_backport

00:03:12

88.0%
passed #467
stretch

00:03:22

88.0%