-JH/02 Add transaction support for hintsdbs. The sole initial provider is
- sqlite, and is used for the wait-transport and retry DBs. Transactions
- imply locking internal to the DB. We no longer need a separate lockfile,
- can keep the DB handle open for extended periods, yet potentially benefit
- from concurrency on non-conflicting record uses.
+JH/02 Add transaction support for hintsdbs. The providers supported are tdb and
+ sqlite. Transactions are used for the wait-transport and retry DBs.
+ They imply locking internal to the DB. We no longer need a separate
+ lockfile, can keep the DB handle open for extended periods, yet
+ potentially benefit from concurrency on non-conflicting record uses.