Salent Olivick

I added length detection and fixed a stupid problem. From the perspective of code analysis, "err" will not be repeated. Changes of rewrite, involves [nginx-adapter-case](:https://github.com/caddyserver/nginx-adapter/issues/35)

I have deleted the irrelevant pr

> I feel like a better approach would be to check the ID as it's being read in and we're creating the mapping of IDs to their full config paths....

add one test.