- Logrotation/repoening via a SIGUSR2 signal wasn't implemented.
  (https://bugs.launchpad.net/zodb/+bug/143600)

Needs windows test.

- Changes in way that garage collection treats dictionaries in Python
  2.7 broke the object/connection cache implementation.
  (https://bugs.launchpad.net/zodb/+bug/641481)

- Object ids created in a savepoint that is rolled back wren't being
  reused. (https://bugs.launchpad.net/zodb/+bug/588389)

  The verbose mode of the fstest was broken.
  (https://bugs.launchpad.net/zodb/+bug/475996)

  Setting _p_changed on a blob wo actually writing anything caused an
  error. (https://bugs.launchpad.net/zodb/+bug/440234)

there aren't any transactions.  Now a string of 8 nulls (aka "z64")
is specified.

Objects added in transactions that were later aborted could have
_p_changed still set (https://bugs.launchpad.net/zodb/+bug/615758).

- ZEO extension methods failed when a client reconnected to a
  storage. (https://bugs.launchpad.net/zodb/+bug/143344)

repeatedly.

Added additional debugging info to try to understand what's going on
on a rare bot test failure that I can't reproduce.

sockets.

failure to deal with a test failure that occurs often in a buildbot,
but that I don't get myself *even* when running on the same machine as
the bot.

failure.

tested incorrectly for ZEO.

  When objects were added in savepoints and either the savepoint was
  rolled back (https://bugs.launchpad.net/zodb/+bug/143560) or the
  transaction was aborted
  (https://mail.zope.org/pipermail/zodb-dev/2010-June/013488.html)
  The objects' _p_oid and _p_jar variables weren't cleared, leading to
  surprizing errors.

without setting the connection.