Factory correctly handles attr that is const but not a parameter. Bug #2564
Add locking when talking to the collector
Fixed Bug #2568.  The message now states the frontend-security class held value and held limit, not the entry values.
Fix handling of held jobs when hitting the held limit
Rude patch of the clean_glidein_queue to return 1 only when something was really done - not ideal, but brings the behaviur closer to 2.5.2. Partially fixes #2598 and #2599