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More lenient IDNA processing in dig

Tony Finch requested to merge 3527-dig-idna-relaxed into main

If there are any problems with IDN processing, DiG will now quietly handle the name as if IDN were disabled. This means that international query names are rendered verbatim on the wire, and ACE names are printed raw without conversion to UTF8.

If you want to check the syntax of international domain names, use the idn2 utility.

This MR replaces !6666 (closed)

Closes #3527 (closed)

Edited by Tony Finch

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