RabbitMQ 3.7.0 Milestone 4 发布

RabbitMQ 3.7.0 Milestone 4 发布了，这是程碑式的第四个版本，一个功能特性预览版。对Erlang/OTP的最低要求版本18.3。

该版本服务端的一些提升：

New configuration file format
I RabbitMQ now supports a new configuration file format.
The format is based on sysctl
and is similar to .ini files. Erlang term configuration files are still supported, it is also
possible to combine the two formats (use both rabbitmq.conf and advanced.config).

Most documentation examples were updated to use both new and classic config formats. See the docs
at next.rabbitmq.com, in particular the configuration guide,
for more information.

GitHub issue: rabbitmq-server#550
Support config file path values with and without file extensions
RabbitMQ no longerrequires RABBITMQ_CONFIG_FILE values that have a .config or .conf suffix–it can handle the string either way.

Github Issue: rabbitmq-server#691
Plugin version constraints
RabbitMQ now has a mechanism for plugin authors to indicate what versions a plugin is compatible with. Incompatible plugins are logged and ignored.

Github Issue: rabbitmq-server#591,
rabbitmq-server#735
Lager-based logging: pluggable backends, debug log level, more flexibility in
configuration.

RabbitMQ now uses Lager for its logging subsystem.
This brings a group of benefits: (quite verbose) debug log level, pluggable logging
backends (e.g. logging to Syslog no longer requires external tools), and much
more flexibility in logging configuration.

See rabbitmq.config.example
for examples of logging configuration with Lager.

GitHub issue: rabbitmq-server#94
LF and CR are now stripped off of names of queues and exchanges
Although line feeds in names are permitted under the AMQP 0-9-1 spec, in practice they can make it very difficult to work with queues and exchanges. Stripping them out makes life much easier for developers.

Github issue: rabbitmq-server#710
Deletion of auto-delete and exclusive queues now leaves (debug) log entries
GitHub issue:rabbitmq-server#590