process, we can loop there. A two-phase queue run will benefit,
particularly for mailinglist and smarthost cases.
+JH/02 Add transaction support for hintsdbs. The sole initial provider is
+ sqlite, and is used for the wait-trasnprot DB. Transactions imply
+ locking internal to the DB. We no longer need a separate lockfile, can
+ keep the DB handle open for extended periods, and still potentially
+ benefit from concurrency on non-conlicting record uses.
+
Exim version 4.98
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