Description of problem:
When processing many rules, it is possible that the number of available MySQL connections is exhausted.

Version-Release number of selected component (if applicable):
4.4.2018-2

How reproducible:
always

Steps to Reproduce:
1. Add many hundreds of bugs to the Rule Engine


Actual results:
E-mails get sent about "Error: Too many connections", and the web site becomes available. This fixes itself after the script terminates (since DBI cleanup removes those connections when the script exits)


Expected results:
No errors.

Additional info:
Obviously my understanding of how the Job Queue handles database connections is incorrect. I'll look at the mail queue and BMO's generate mail to see how it should be done :)