v2.3.2 release candidate released

[Timo Sirainen]

https://dovecot.org/releases/2.3/rc/dovecot-2.3.2.rc1.tar.gz
https://dovecot.org/releases/2.3/rc/dovecot-2.3.2.rc1.tar.gz.sig 

v2.3.2 is mainly a bugfix release. It contains all the changes in v2.2.36, as well as a bunch of other fixes (mainly for v2.3-only bugs).

 * old-stats plugin: Don't temporarily enable PR_SET_DUMPABLE while
   opening /proc/self/io. This may still cause security problems if the
   process is ptrace()d at the same time. Instead, open it while still
   running as root.

 + doveadm: Added mailbox cache decision&remove commands. See
   doveadm-mailbox(1) man page for details.
 + doveadm: Added rebuild attachments command for rebuilding
   $HasAttachment or $HasNoAttachment flags for matching mails. See
   doveadm-rebuild(1) man page for details.
 + cassandra: Use fallback_consistency on more types of errors
 + lmtp proxy: Support outgoing SSL/TLS connections
 + lmtp: Add lmtp_rawlog_dir and lmtp_proxy_rawlog_dir settings.
 + submission: Add support for rawlog_dir
 + submission: Add submission_client_workarounds setting.
 + lua auth: Add password_verify() function and additional fields in
   auth request.
 - doveadm-server: TCP connections are hanging when there is a lot of
   network output. This especially caused hangs in dsync-replication.
 - Using multiple type=shared mdbox namespaces crashed
 - mail_fsync setting was ignored. It was always set to "optimized".
 - lua auth: Fix potential crash at deinit
 - SSL/TLS servers may have crashed if client disconnected during
   handshake.
 - SSL/TLS servers: Don't send extraneous certificates to client when
   alt certs are used.
 - lda, lmtp: Return-Path header without '<' may have assert-crashed.
 - lda, lmtp: Unencoded UTF-8 in email address headers may assert-crash
 - lda: -f parameter didn't allow empty/null/domainless address
 - lmtp, submission: Message size limit was hardcoded to 40 MB.
   Exceeding it caused the connection to get dropped during transfer.
 - lmtp: Fix potential crash when delivery fails at DATA stage
 - lmtp: login_greeting setting was ignored
 - Fix to work with OpenSSL v1.0.2f
 - systemd unit restrictions were too strict by default
 - Fix potential crashes when a lot of log output was produced
 - SMTP client may have assert-crashed when sending mail
 - IMAP COMPRESS: Send "end of compression" marker when disconnecting.
 - cassandra: Fix consistency=quorum to work
 - dsync: Lock file generation failed if home directory didn't exist
 - Snippet generation for HTML mails didn't ignore &entities inside
   blockquotes, producing strange looking snippets.
 - imapc: Fix assert-crash if getting disconnected and after
   reconnection all mails in the selected mailbox are gone.
 - pop3c: Handle unexpected server disconnections without assert-crash
 - fts: Fixes to indexing mails via virtual mailboxes.
 - fts: If mails contained NUL characters, the text around it wasn't
   indexed.
 - Obsolete dovecot.index.cache offsets were sometimes used. Trying to
   fetch a field that was just added to cache file may not have always
   found it.