[FS#747] default dns service doesn't provide qname minimization

[LEDE Bugs]

The following task has a new comment added:

FS#747 - default dns service doesn't provide qname minimization
User who did this - Daniel Svensson (dsvensson)

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The point here is being privacy friendly by default, rather than requiring users to install unbound on their own.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=747#comment2533