Removed all the "enum foo;" declarations. They didn't seem to be very standard. Old gcc versions warn about them and C++ code doesn't like them.

lib-storage: Removed rename_children parameter from mailbox_rename() The children are now always renamed. The only reason this feature was added in the first place was to make dsync's job easier, but this is no longer needed.

notify plugin: Added mailbox_update and mailbox_set_subscribed notifications.

notify: Added support for mailbox_create

notify: Removed noop functions, they're no longer needed.

Fixed plugins to use the new mailbox rename API. --HG-- branch : HEAD

lib-storage: Mailbox deletion API changed. Mailbox deletion should now be free of race conditions. The actual file deletion code is now responsibility of mailbox_list backend. --HG-- branch : HEAD

lib-storage: Plugin hook API changed to support per-user plugins within a process. --HG-- branch : HEAD

Added a notify plugin that can be used as a generic event catching framework by other plugins. Patch by Mark Washenberger / Rackspace. --HG-- branch : HEAD