Log Message:
-----------
Fix potential deadlock. Transaction.hooks was not protected by a lock. I think
this caused odd deadlocks from time to time by sneaking in a hook to the list
after it had been processed for finishing, which, of course, would be deadly to
Transaction.wait().
Modified Files:
--------------
pq/src:
transam.py (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/src/transam.py.diff?r1=1.3&r2=1.4)
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TIP 2: Don't 'kill -9' the postmaster
