Fix compilation on systems that do not define HOST_NAME_MAX #9127
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Short description
On FreeBSD at least, HOST_NAME_MAX is not defined and we need to use sysconf() to get the value at runtime instead.
Based on a work done by @RvdE to make the recursor compile on FreeBSD (many thanks!).
This PR generalizes the work done in #9125 to cover the authoritative server and dnsdist as well.
Checklist
I have: