[PATCH] Improve ldb unindexed search perf

[Andrew Bartlett]

This patch set helps us to avoid many talloc() and talloc_free() calls
during the scan of the whole database or of a large index.

Please review.

I'll do a better perf test on this tomorrow.

Andrew Bartlett
-- 
Andrew Bartlett
https://samba.org/~abartlet/
Authentication Developer, Samba Team         https://samba.org
Samba Development and Support, Catalyst IT   
https://catalyst.net.nz/services/samba



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