auth: if no backet section was specified in config, always allow path-through auth
auth: implemented noauth_read/all checks in bucket. Added auth checks into lookup/redirect/buffered-write hooks
auth: some sanity checks
bucket: if no token was set, 'succeed' verification
bucket: if no groups exist, then given bucket is 'empty', or basically it was not written into the storage. more logs.
bucket: added index-data for bucket indexes
io: added bucket checks and index update into upload
bucket: pack more fields into metadata (max size, max key num, reserved fields). Removed bucket name from index data.
io: remove object if its bucket index update failed
io: unified upload processing both for buffered and simple IO. includes reply generation and bucket index updating.