copy from there.
Update the Sieve plugin accordingly to 1.1.5.
Major changes since 1.0:
* After Dovecot v1.1 has modified index or dovecot-uidlist files,
they can't be opened anymore with Dovecot versions earlier than
v1.0.2.
* See doc/wiki/Upgrading.1.1.txt (or for latest changes,
http://wiki.dovecot.org/Upgrading/1.1) for list of changes since
v1.0 that you should be aware of when upgrading.
+ IMAP: Added support for UIDPLUS and LIST-EXTENDED extensions.
+ IMAP SORT: Sort keys are indexed, which makes SORT commands faster.
+ When saving messages, update cache file immediately with the data
that we expect client to fetch later.
+ NFS caches are are flushed whenever needed. See mail_nfs_storage and
mail_nfs_index settings.
+ Out of order command execution (SEARCH, FETCH, LIST), nonstandard
command cancellation (X-CANCEL <tag>)
+ IMAP: STATUS-IN-LIST draft implementation
+ Expire plugin can be used to keep track of oldest messages in
specific mailboxes. A nightly run can then quickly expunge old
messages from the mailboxes that have them. The tracking is done
using lib-dict, so you can use either Berkeley DB or SQL database.
+ Namespaces are supported everywhere now.
+ Namespaces have new list and subscriptions settings.
+ Full text search indexing support with Lucene and Squat backends.
+ OTP and S/KEY authentication mechanisms (by Andrey Panin).
+ mbox and Maildir works with both Maildir++ and FS layouts. You can
change these by appending :LAYOUT=3Dmaildir++ or :LAYOUT=3Dfs to
mail_location.
+ LDAP: Support templates in pass_attrs and user_attrs
+ Support for listening in multiple IPs/ports.
+ Quota plugin rewrite: Support for multiple quota roots, warnings,
allow giving storage size in bytes or kilo/mega/giga/terabytes,
per-mailbox quota rules.
+ Filesystem quota backend supports inode limits, group quota and
RPC quota for NFS.
+ SEARCH and SORT finally compare non-ASCII characters
case-insensitively. We use i;unicode-casemap algorithm.
+ Config files support splitting values to multiple lines with \
