Changes 0.4.17:
- LDA Sieve plugin: Fixed handling of an early explicit keep during
  multiscript execution. Action side-effects and the message snapshot would be
  lost at the final stage where the implicit keep is evaluated. This could
  result in the IMAP flags assigned to the message to be forgotten or that
  headers modified by the "editheader" extension would revert to their
  original state.
- file script storage: Amended the up-to-date time stamp comparison for
  on-disk binaries to include nanoseconds. This will fix problems occurring
  when both binary and script are saved within the same second. This fix is
  ineffective on older systems that have no support for nanoseconds in stat()
  timestamps, which    should be pretty rare nowadays.
- file script storage: Improve saving and listing permission error to include
  more details.
- imapsieve plugin: Make sure "INBOX" is upper case in static mailbox rules.
  Otherwise, the mailbox name would never match, since matching is performed
  case-sensitively and Dovecot only returns the upper-cased "INBOX".
- imapsieve plugin: Fixed assert failure occurring when used with virtual
  mailboxes.
- doveadm sieve plugin: Fixed crash when setting Sieve script via attribute's
  string value.

(adam)