[Dovecot] v2.0.21 released

[Andreas Meyer]

Timo Sirainen <tss at iki.fi> wrote:

> http://dovecot.org/releases/2.0/dovecot-2.0.21.tar.gz
> http://dovecot.org/releases/2.0/dovecot-2.0.21.tar.gz.sig
> 
>         + dict: file backend supports now also fcntl/flock locking optionally
>         - imap-login: Memory leak fixed
>         - imap: Non-UTF8 input on SEARCH command parameters could have crashed
>         - auth: Fixed crash with DIGEST-MD5 when attempting to do master user
>           login without master passdbs. 
>         - sdbox: Don't use more fds than necessary when copying mails.
>         - mdbox kept the user's storage locked a bit longer than it needed to
> 

Please can some soul explain the naming conventions used to release this software?

Tue Jun 12 00:51:56 EEST 2012
Released v2.0.21.
Tue May 29 22:24:49 EEST 2012
Released v2.1.7.

I don't understand the numbering.

  Andreas