- Configurable background job limits for RichMedia (link previews) and MediaProxyWarmingPolicy
- Ability to define custom HTTP headers per each frontend
- MRF (`NoEmptyPolicy`): New MRF Policy which will deny empty statuses or statuses of only mentions from being created by local users
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- New users will receive a simple email confirming their registration if no other emails will be dispatched. (e.g., Welcome, Confirmation, or Approval Required)
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