plugin/import: add high caps for snippet/file import #7567
Merged
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1. Why is this pull request needed and what does it do?
To fix Corefile related import cycle issue. See coredns/caddy#8 and coredns/caddy#9 for further information. Fixed in coredns/caddy v1.1.3.
2. Which issues (if any) are related?
Fixes OSS-Fuzz #42486385. I ran the reproducer locally to validate.
3. Which documentation changes (if any) need to be made?
Added docs about the import limit.
4. Does this introduce a backward incompatible change or deprecation?
See above. The import limit is arbitrary but generous. Worth noting that a glob pattern counts as one. Importing a directory that has any number of configuration is fine.