Revision 418203

Update to 0.4.15.

* vacation extension: The sieve_user_email setting is now used in the
  check for implicit delivery.
- imapsieve plugin: For any mail transaction, the mailbox was opened a
  second time, even if no mailbox rule matched. This was unintentional,
  useless and caused problems when the imapsieve plugin was used with
  other plugins like acl.
- extprograms plugin: Significantly improved error handling. No stream
  errors were logged.
- extprograms plugin: Fixed bug in handling of result code from remote
  program (script service).
- extprograms plugin: Connection to remote program service was not
  retried.
- Several small fixes based on static analysis.
- Fixed handling of quoted string localparts in email addresses.

PR:		210905
Submitted by:	maintainer (Larry Rosenman)