ObjectManager.  Also disallowed IDs that end with two underscores.

SOFTWARE_HOME and INSTANCE_HOME.

the PTK.

MailHost legacy methods.

in the public repository.  I actually removed some unnecessary
backslashes from some string concatenations within parenthesized
expressions, or missing close-parens in a module docstring, etc.

  for 2.3a1.

* Commit "WebDAV source" and "hookable PUT creation" features to trunk
  for 2.3a1.

and SECURITY.