lib-storage: remove unused internal_attribute argument from attribute_{get,set} This removes an argument added in 9f37ef2a9192e7d47e3d7ac959080fd01120f2e9 but obsoleted (but not removed) in d1147c225f64596fc5eeb1cb2aab31b3c57d5215. Not only does this change simplify the codebase, it actually brings the API closer to what it was back in 2.2.

global: Update mailbox_attribute_get API usage

lib-storage: mailbox_attribute_set() now uses struct mail_attribute_value. This allows settig the last_change value, as well as using streams and setting other flags in future.

acl: Added ACL checks for attributes. Added ACL <-> mailbox attribute mapping. The ACL checks will be useful once IMAP METADATA extension is finished. The mapping is used by dsync to sync ACLs via generic attribute syncing.

Initial commit for making mail_storage:mailbox_list to be from 1:1 to n:n. This will allow namespaces to share the same storage and a single namespace to have multiple storages (multiple mailbox formats). Neither works currently, and this commit probably breaks some things. --HG-- branch : HEAD

Initial support for LISTing users with shared mailboxes. --HG-- branch : HEAD

ACLs: Initial support for "post" right. --HG-- branch : HEAD

Added IMAP ACL commands with ability to modify ACLs. Based on patch by Bernhard Herzog and Sascha Wilde. --HG-- branch : HEAD