Lennart Poettering
97c2ea2645
For the wildcard NSEC check we need to generate an "asterisk" domain, by prepend the common ancestor with "*.". So far we did that with a simple strappenda() which is fine for most domains, but doesn't work if the common ancestor is the root domain as we usually write that as "." in normalized form, and "*." joined with "." is "*.." and not "*." as it should be. Hence, use the clean way out, let's just use dns_name_concat() which only exists precisely for this reason, to properly concatenate labels. There's a good chance this actually fixes #5029, as this NSEC proof is triggered by lookups in the TLD "example", which doesn't exist in the Internet.
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