Comment 6 for bug 498525

Ok the first stab at this involved updating the system default core limit to 1, which would then give us the semanatics we desire. However this does not work as pam will zap all of the user processes to a core limit of 0 and they will again be ignored. Will try out switching the recursion detection to 1. Note that apport does not set its limit at all currently and that will need fixing either way.