through exceptions

HTTP spec (RFC 2616).

  provided tests and implementation for guarded_zip (RestrictedPython).

for failed imports, obscuring later attempts to import the same broken module.

'AccessControl.ZopeGuards.guarded_import' mapped some Unauthorized exceptions
onto ImportErrors:  don't do that!  Also, removed mutable defaults from
argument list, improved tests.

NotFound errors.

Merged the slinkp-datetime-200007 branch: fix the DateTime(anotherDateTime) constructor to preserve timezones.

Merged from branches/slinkp-zopectl-exitcode-143813; fixes # 143813: zopectl should exit non-zero if child processes fail.

o See https://bugs.launchpad.net/zope2/+bug/143748

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Backport of fix committed to 2.10; see http://www.mail-archive.com/zope-checkins@zope.org/msg03128.html.

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The REQUEST should not accept holds after it has been closed.

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

        errors