Be more careful about specifying a container class: root databases should not have a container class.

to an object but returns the name instead of the object (for values
that should be strings that later resolve to an object during startup).

Fix container-class functionality.  It could be specified in the configuration
but was never actually used.

Alias the SimpleTemporaryContainer at the package level.

- Use autoClassFactory by default.  This is better for mounted databases
  than the default.

- Don't specify a default connection class; let the database decide the
  default.

- Allow database types other than zodb_db.

Also set the connection class only when specified.

Changes:

 - startup log handler now pays attention to the logging levels of
   the handlers defined within the config file and uses the "lowest"
   level to log messages to stdout during startup.

 - entirely removed warning when the starting user's umask is "too
   permissive".  it wasn't clear that it added any value under normal
   operations.

 - replaced ancient setuid code with code stolen from zdaemon that
   works the same but looks nicer.

Don't try to optimize by checking for disabled and effective levels within the log method.  The logger's level may not be meaningful if this logger is configured with handlers that accept messages at a lower level than that of the logger itself.

DeprecationWarnings in Python 2.3 go away. See
http://www.python.org/peps/pep-0263.html for more information.

quickstart page if the root acl_users contains no users.  Required an
additional default user folder method, hasUsers.

work again.

"zopectl adduser <name> <password>" will add a user with the 'Manager' role
to your site.  This is useful both interactively and for packagers.

Bugfix: if zopectl is run as the root user, the debug, run, and adduser
commands will cause the Python process which performs those actions
to switch users to the effective user.  This prevents ZODB index files,
log files, etc. from being written as root, potentially preventing
later startup by the effective user.

Bugfix: allow the zopectl process to ascertain the program that zdrun should
run from the Zope config file.  This is necessary if the file is moved
out of a "single-directory-as-instance" instance home.

Make sure we copy over donothing.sh from zdaemon.tests (a test fails to run on non-inplace builds if we don't).