cubicweb #1009319 ldapuser source can create Looping Tasks with a period of 0s [resolved]

We've had the case on site of a bad configuration file triggering the creation of a looping task with a period of 0s which would badly harm the server.

priorityimportant
typebug
done in3.8.3
load1.000
load left0.000
closed by<not specified>