(cherry picked from commit 84d262f1)

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(legacy) refactor services_unbound_acls.php, add automatically generated acl's. closes https://github.com/opnsense/core/issues/563

(cherry picked from commit 5400549c)

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Discussed with: @adschellevis

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    <tag>
      <!-- foo -->
    </tag>

Array tags are saved as text tags instead, clobbering the initial
configuration...

(cherry picked from commit 30cce013)

(cherry picked from commit b78606b8)

(cherry picked from commit 9297c0e0)

(cherry picked from commit 53747001)