Release 3.7.4

Release 3.7.4-rc.4

Release 3.7.4-rc.3

Release 3.7.4-rc.2

Release 3.7.4-rc.1

Merge pull request rabbitmq#1482 from rabbitmq/rabbitmq-server-vhost-…

…sup-sup-badarg

Only call vhost status for fully started nodes

Merge pull request rabbitmq#1482 from rabbitmq/rabbitmq-server-vhost-…

…sup-sup-badarg

Only call vhost status for fully started nodes

Merge pull request rabbitmq#1472 from rabbitmq/rabbitmq-server-1471

Temporarily raise log high water mark when node boots

Merge pull request rabbitmq#1466 from rabbitmq/rabbitmq-server-story-…

…153435857

Internal authN backend: make it impossible to successfully log in with a blank password (for 3.6.x)

Explain the heads in rabbit_auth_backend_internal:user_login_authenti…

…cation/2.

[#153435857]