Plone.recipe.zope2instance

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- When creating the blobstorage dir, make it only readable for the
current user, otherwise you get a ZODB warning on startup. This
uses code from the ZODB, which does the same when Zope starts up and
the blobstorage directory does not exist yet.
[maurits]

- Fixed check for empty custom_access_event_log and custom_event_log.
[alecghica]

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- Recipe would fail if eggs are stored in readonly cache. Don't copy
permissions from the egg.
[garbas]

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- Add trove classifiers to note Python version compatibility.
[hannosch]

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- Pass python flags to Zope interpreter as well. This prevents the debug
command from exiting directly.
[wichert]

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- Load PYTHONSTARTUP if defined when running the debug command.
[mj]

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- Use interpreter script instead of setting PYTHONPATH. Fixes Windows
"the environment variable is longer than 32767 bytes" error.
[rossp]

- Make the zope.conf http-server optional by setting http-address to
an empty string. Useful for configurations used under an external
server such as a WSGI deployment.
[rossp]