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f12a205657
Previous gai_strerror() returned numeric representation of the code, but used TLS storage, which might cause issues with stack sizes on all tasks in the system. Alternatively we can leave the storage to static only (which wouldn't be thread-safe) or we could one-time allocate and never free (which is wrong). This option uses hardcoded strings for common error codes used in lwip. The disadvantage is that we might need to update the impl in the future when lwip adds more codes.