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* Issue 217: Once again, the OS X backend uses the
Framework API for invoking the Keychain service.
As a result, applications utilizing this API will be
authorized per application, rather than relying on the
authorization of the 'security' application. Consequently,
users will be prompted to authorize the system Python
executable and also new Python executables, such as
those created by virtualenv.
260: No longer does the keyring honor the ``store``
attribute on the keyring. Only application passwords
are accessible.