no_copyback in sync
sync_server: partial "force" mode (more to do)
mboxevent: correct modseq (new rather than old) on flag change
smmapd: audit log
smmapd: log clienthost
cyrusdb_flat: whitespace layout
cunit: test for new buf_init_mmap
auditlog: only log modseq if it's been dirtied
mappedfile: don't remember future sizes after a re-stat
index: track old modseq as well on expunge (including move)
reconstruct: remove files that don't have a length field
sync_reset: use newer API and wipe DB records more
idle: use NOWAIT if possible
mboxlist: re-suppress DELETED mailboxes (see caldav merge)
mboxlist: support skipdel in allusermbox properly
mboxlist: delete again is OK
sync_reset: really try hard not to bail
sync: don't suppress mailbox events just because user event exists

This should fix user rename issues (hopefully)
twoskip: replace NULLs in key with dashes in DUMP command
rename: save 'unuser' synclog event until the end of the renames