[PATCH] DNS performance fix

[Aaron Haslett]

Hi all,

Indeed's Austin office has a DNS performance problem which we tracked
down to a database search efficiency problem.  The issue is
SCOPE_ONELEVEL is used on wildcard dns searches, but onelevel searches
currently have a performance problem related to GUID indexing, so this
patch changes the search scope to SCOPE_SUBTREE.

https://gitlab.com/catalyst-samba/samba/pipelines/42781270

https://bugzilla.samba.org/show_bug.cgi?id=13738

Thanks,

Aaron H and the Catalyst team

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