Changing to pickle protocol 2 has severe backward compatibility
implications; changes to ZODB should not be made from the Zope
trunk regardless.

FileStorage.history() was reading the user, description,
and extension fields out of the object pickle, due to
starting the read at a wrong location.

store history informations. In ZODB 2.8 'tid' is used.
At least the management screen is showing up again however
the 'description' value shows only garbage. Also there might a 
problem with backward compatibility.

     - Re-added the DAV header (Collector #1518) which had been removed
       in beta 1.

Restored the ._opened attribute of Connection.  Don't know why it went away
in 3.3.  Probably because it was only referenced by connectionDebugInfo(),
and Jeremy didn't realize anyone used that <wink>.

The DB.cacheStatistics() method was introduced in DB.py rev 1.2,
and has always returned an empty tuple.  A number of "never did
anything, probably never will" DB methods like that were removed
in ZODB 3.3, to reduce stumbling over decoys.  That was discussed
on zodb-dev at the time, with universal agreement to get rid of
them.

So the resolution in this case is changing Zope to stop trying
to access the no-longer-extant cacheStatistics() method.  If
someone doesn't like this, they can revert this patch, then
change App/CacheManager.py's cacheStatistics() to return a
hard coded empty tuple <wink>.

Caution:  Since no deprecation warnings about Transaction.begin()
were raised by the test suite before this patch, none of this code
is exercised by the test suite -- or it is, but "something"
suppresses the deprecation warnings.  So it's hard to claim that
this patch has been tested; the strongest claim I can make is that
all the unit tests still pass.

1. a_Transaction_object.begin() is deprecated.  Don't use it.

2. Commit failure is "sticky" now:  the current transaction
   must be explicitly discarded (abort() or begin()) before
   a commit can succeed again.

Collector #1457: ZCTextIndex's QueryError and ParseError are now available for import from untrusted code.

     - Collector #1491: talgettext.py did not create a proper header
       for the generated .pot file if multiple pagetemplate files
       were processed.

- Updated to use transaction.commit() rather than
  get_transaction().commit()

       same signature as str.strip()

No commit message

dd Michael Dunstan's "explicit abort after error propagates into publisher" patch as documented in http://zope.org/Collectors/Zope/789 and as required by recent changes to ZODB which prevent a connection from being cleanly closed if modifications are extant in that connection.

(Merge from 2.7 branch)

via distutils to a relative path.

(corresponds with ZopeX3-3.0 branch revision 27434)

in HTTPRequest.keys() - it caches URLN and BASEN in other.