This version refactors http client used in nacos-client, and rollback to use JDK http client to reduce the version conflict and enhance the log. What's more, this version refactors eventDispatcher to improve the performance and readability. Finally, fix some bugs and do some enhancement for console.

[#1839] Add ContentType return while getConfig. [#2856] Adjust the use of thread pools. [#2858] Unified http client implementation, enhanced async request callback interface. [#3091] Fix address server can't start up by implement an empty auth manager. [#3103] Fix can't create properties config [#3179] Replace the original Notify implementation in the nacos's other modules. [#3197] NacosRestTemplate enhance. [#3210] Enhanced nacos resttemplate response handler. [#3224] nacos-client module http client replace. [#3300] Optimize the default "minIdle"" of HikariPool set by naocs. [#3311] Add specified Logger when constructing nacos resttemplate. [#3317] Change the http client implementation that nacos resttemplate depends on from apache to JDk. [#3324] Fix http client close bug. [#3353] Adjust the value logic of clientBeatInterval. [#3356] Fix no throw exception when publish event but no subsciber. [#3366] Fix the thread safety problem of obtaining HttpRequestBase through BaseHttpMethod enumeration. [#3370] Issue with executing shell script /bin/sh^M on Unix/Linux. [#3382] Use PreparedStatement to replace string concatenation. [#3388] Reset nacos roles, permissions during reloading role info from database. [#3399] Unified implementation of http client package division. [#3409] Fix Nacos can't start by the startup.cmd script in windows environment. [#3428] Fix token valid go login bug. [#3434] Fix DataAccessException when running in embedded mode. [#3485] Fix the UnknownHostException is swallowed.

[#3207][#3453] Fix some document description error.