disable telnet by default

[chickenlj]

No description provided.

[codecov-commenter]

Codecov Report

Merging #8239 (cd5a5da) into master (c5a4597) will increase coverage by 0.44%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #8239      +/-   ##
============================================
+ Coverage     60.82%   61.26%   +0.44%     
- Complexity      456      489      +33     
============================================
  Files          1090     1090              
  Lines         43950    43963      +13     
  Branches       6418     6420       +2     
============================================
+ Hits          26732    26934     +202     
+ Misses        14243    14053     -190     
- Partials       2975     2976       +1     

Impacted Files	Coverage Δ
...va/org/apache/dubbo/common/config/Environment.java	83.33% <100.00%> (+0.57%)	⬆️
...apache/dubbo/common/extension/ExtensionLoader.java	81.31% <100.00%> (+0.50%)	⬆️
...ava/org/apache/dubbo/config/DubboShutdownHook.java	88.46% <100.00%> (-0.91%)	⬇️
.../apache/dubbo/config/bootstrap/DubboBootstrap.java	54.74% <100.00%> (+0.05%)	⬆️
.../remoting/telnet/support/TelnetHandlerAdapter.java	52.27% <100.00%> (ø)
...in/java/org/apache/dubbo/common/utils/JVMUtil.java	81.13% <0.00%> (-11.33%)	⬇️
...tadata/DynamicConfigurationServiceNameMapping.java	45.45% <0.00%> (-6.07%)	⬇️
...he/dubbo/registry/multicast/MulticastRegistry.java	67.44% <0.00%> (-2.33%)	⬇️
...he/dubbo/registry/zookeeper/ZookeeperRegistry.java	60.24% <0.00%> (-1.21%)	⬇️
... and 43 more

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