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Collector #1306: Missing acquisition context on local roles screen.

 - Merge r76767 from trunk. Fixes collector issue #1441, adding a configuration option to enable Microsoft WebFolders to work with Zope again, disabled by default.

Fixed bug in ZPublisher.BaseRequest with persistent site managers. An EndRequestEvent was thrown after the ZODB connection was already closed and thus the site manager not being available anymore.

registered via five:registerPackage.

        errors

Add support for delayed initialization of packages through a _packages_to_initialize list on the Products package

DB.open() doesn't support the `mvcc` parameter in ZODB 3.8, so `checkWithoutMVCCRaisesReadConflict` won't raise a `ReadConflictError` either

DB.open() doesn't support the `synch` parameter in ZODB 3.8, so this test doesn't make sense anymore (and can be removed)

o Move unneeded global imports to point of use.

o Wrap long lines.

o Make setUp / tearDown explicit.

o Avoid use of testcase instance variables.

o Split apart edge cases into discrete testcase methods.

o Use stock 'assertEqual', 'failUnless' methods of unittest.

Test both the 'trusted' and the 'untrusted' versions of the engine,
using a common base class.

  XXX:  This split will allow new tests which verify the security
        semantics of each version of the engine.

Collector #2320: HTTPResponse setHeader lowercased keys but getHeader did not, causing lookups of 'Content-Type' to fail

Fix DateIndex date display; unpack stored integers into something meaningful. This fixes Collector #2316.

Repair (and simplify) tests in response to
http://www.zope.org/Collectors/Zope/2308.

Configure subscribers in code, not by loading ZCML.