v2.2.36 release candidate released

[Timo Sirainen]

https://dovecot.org/releases/2.2/rc/dovecot-2.2.36.rc1.tar.gz
https://dovecot.org/releases/2.2/rc/dovecot-2.2.36.rc1.tar.gz.sig 

v2.2.36 is hopefully going to be the last v2.2.x release. Please test this RC well, so we'll have a good final release! v2.3.2 is still going to take a couple of months before it's ready.

 * login-proxy: If ssl_require_crl=no, allow revoked certificates.
   Also don't do CRL checks for incoming client certificates.
 * 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.
 - 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: 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.