List alarms in rabbitmqctl status
Optimise queue index initialisation

Avoid loading the journal when the file doesn’t exist.
Also try to avoid flushing the journal unless necessary.
merge default into bug25853
Fix a syntax error in config example
merge default into bug25853
merge default into bug25853
containing the recently merged bug25827
Perform (and wait for) queue recovery in parallel
Simplify durable queue recovery and avoid a dict lookup on the results
Use dirty opts to find durable queues during startup (and optimise)
simplifying refactor
rename misleading variables
...and fix a counting error
cosmetic
merge default into bug25853
oops
rabbit_file:wildcard/2 should return [] if the dir is non-existing
merge default into bug25853
since the previous merge pulled in a breakage
Allow username without password after all.
Merge bug25985 (again)
Handle down messages from the delegate, since that's what we're monitoring locally. And make sure that cast/2 has cast-like semantics - don't blow up if the gen_server has stopped.
Merge bug26005