[Discussion] 如何对URL去重


我觉得应该在两个角度去考虑
1. 在Dubbo2中我们应该根据`接口+服务分组+版本号`来去重
2. 但是在Dubbo3中我们支持了多实例，`接口+服务分组+版本号`不再是唯一条件，在Dubbo3中Framework、Application也应该是去重条件

但是现在URL#equals方法中，只有URLAddress（既`ip+port`）和URLParam

Start by reading the URL#equals implementation and its handling of URLAddress and URLParam, as named in the discussion. Determine the intended deduplication rules for Dubbo 2 and Dubbo 3, then identify or add focused tests that make the chosen behavior and completion criteria explicit.

Written by the indexing model from the issue text.