Issue #2670068 by jdleonard, reinier-V: Error opening socket over SSL on PHP >= 5.6
Initialize response property to avoid loss of data during concatenation.
Fix bug when launch fails on class/object callback.
Issue #2308813 by thinkact: Missing server port.
Issue #2311381 - Bad behavior compatibility via User-Agent.
Use proper handle prefix for Ultimate Cron.
Fix callback formatting on list page.
Fix running user.
Issue #2148153 by Kevin Rogers, gielfeldt: Fix upgrade path.
Revert "Fixed Drupal major version upgrade bug."
This reverts commit 8fdd4d090bc89cb9d327435d6326b3991db32998.
Issue #2059851 by thekevinday: Fix permissions.
Issue #2059867 by thekevinday: Background Batch does not handle the case where progress_get_progress() does not return an object.
Fix warning when anonymous user (drush) unlocks job.
Fixed loss of settings when changing dispatcher/balancer.
Fixed default value.
Added cleanup functionality.
Fixed some checkstyle warnings.
Fixed default values.
Fixed variable names in exception messages.
Fixed dispatching of background processes.
Fixed balancers and fallback forms.
Refactored forms and inherited settings.
Removed cleanup for now.
Added optional timeouts for http function.
Changed to lowerCamelCase functions in plugins.
Improved UI for main dispatcher and balancer "form".
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