global: Change string position/length from unsigned int to size_t Mainly to avoid truncating >4GB strings, which might potentially cause some security holes. Normally there are other limits, which prevent such excessive strings from being created in the first place. I'm sure this didn't find everything. Maybe everything could be found with compiler warnings. -Wconversion kind of does it, but it gives way too many unnecessary warnings. These were mainly found with: grep " = strlen" egrep "unsigned int.*(size|len)"

Added MAIL_INDEX_SYNC_FLAG_REQUIRE_CHANGES flag and changed mail_index_sync_begin() to return 1 at success and 0 if there's nothing to do. --HG-- branch : HEAD

Don't forward declare enums. It doesn't seem to work with all compilers. --HG-- branch : HEAD

Don't sync mailbox when committing transaction. It's not needed. --HG-- branch : HEAD

Changed .h ifdef/defines to use <NAME>_H format. --HG-- branch : HEAD

mailbox_transaction_commit_get_uids() now returns also UIDVALIDITY. It's the only usable way to get it returned correctly. Removed maildir-specific mailbox_get_status() handling, it's supposed to return the current state of the mailbox, not the latest state. It was useful only for returning non-zero UIDVALIDITY for newly created mailboxes, and that's no longer needed. --HG-- branch : HEAD

mail_index_sync_begin() returns now transaction directly so the syncing code doesn't need to create it. It's also automatically committed/rollbacked. --HG-- branch : HEAD

Added sync_notify() callback to struct mail_storage. It's now called for expunges and flag/keyword changes (except with cydir). --HG-- branch : HEAD

Added a simple cydir mail storage backend. It trusts index files completely: if the indexes are gone, the mailbox starts completely empty and overwriting the existing mail files. So probably not a good idea to use this in production yet. --HG-- branch : HEAD