Updated copyright notices to include the year 2018.

global: Use mail_set_critical() and mailbox_set_critical() if possible Replace calls to mail_storage_set_critical() with mail_set_critical() or mailbox_set_critical() in places where mailbox or mail are easily available.

Updated copyright notices to include the year 2017.

lib-storage: Update mailbox.recent_flags_count correctly. The counter was increased even if the UID was already in recent_flags. This is the only place where I found that recent_flags and recent_flags_count could become desynced (which they definitely were in a core dump), so hopefully this fixes assert-crashes like: Panic: file index-status.c: line 130 (index_storage_get_open_status): assertion failed: (status_r->recent <= status_r->messages)

lib-storage: Added mailbox_recent_flags_expunge_uid() For storage backends where it's useful.

global: freshen copyright git ls-files | xargs perl -p -i -e 's/(\d+)-201[0-5]/$1-2016/g;s/ (201[0-5]) Dovecot/ $1-2016 Dovecot/'

lib-storage: Added mailbox_recent_flags_set_uid_forced() This allows adding recent flags to mails whose UID is lower than the existing recent mails.

lib-storage: Moved most of the \Recent flag handling code to mailbox-recent-flags.c There are also some API changes, because functions were renamed and the recent_* fields were moved to struct mailbox. I'm not aware of any plugins using these though, except for index_mailbox_set_recent_seq() which for now is kept as a backwards compatibility macro. No changes were made to the actual code logic.