Replace #19857 Close #19856 Close #10311 Close #10123 Major changes: 1. Move a lot of code from `environment-to-ini.go` to `config_env.go` to make them testable. 2. Add `__FILE` support 3. Update documents 4. Add tests  | 
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							Replace #19857 Close #19856 Close #10311 Close #10123 Major changes: 1. Move a lot of code from `environment-to-ini.go` to `config_env.go` to make them testable. 2. Add `__FILE` support 3. Update documents 4. Add tests  | 
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