OPNSense/core d582047src/www system_general.php services_opendns.php

system: safety belts for dnsallowoverride #2751

bindsto wizard magic may be faulty still.  Shell scripts do stupid
things as well...

(cherry picked from commit a07dca958fc9781b97193773bbf67e0ff0984c78)
DeltaFile
+5-1src/www/system_general.php
+3-1src/www/services_opendns.php
+8-22 files

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