sharing DB_ENV between DB berkeleydb instances

[Caolán McNamara]

On Fri, 2012-03-23 at 19:29 +0100, Michael Stahl wrote:
> the  Linux-RHEL6-x86_64 at 14-with-check tinderbox seems to think so:
> 
> > DB_THREAD mandates memory allocation flag on data DBT
> > warn:legacy.osl:9258:1:/home/tinderbox/master/desktop/source/deployment/dp_persmap.cxx:63: [/home/tinderbox/master/workdir/unxlngx6/CustomTarget/smoketest/user/extensions/bundled/extensions.db] Berkeley Db error (0): Db::get: Invalid argument
> > warn:legacy.osl:9258:1:/home/tinderbox/master/desktop/source/deployment/manager/dp_manager.cxx:1474: OSL_ASSERT

meh, tweaked that now. Quite possible still a bad idea, but should pass
smoketest now.

C.