Log Message:
Update to dovecot-1.0rc25.

	* If time moves backwards, Dovecot kills itself instead of giving
	  random problems.

	+ Added --with-headers configure option to install .h files.
	  Binary package builders could use this to create some dovecot-dev
	  package to make compiling plugins easier.
	- PLAIN authentication: Don't crash dovecot-auth with invalid input.
	- IMAP APPEND: Don't crash if saving fails
	- IMAP LIST: If prefix.INBOX has children and we're listing under
	  prefix.%, don't drop the prefix.
	- mbox: Broken X-UID headers still weren't handled correctly.
	- mail-log plugin: Fixed deleted/undeleted logging.