Log Message:
Update Dovecot to 1.0beta3.  Changes include:

  * Dotlock code changed to timeout faster in some situations when
    the lock file is old.
  + Added support for loading SQL drivers dynamically (see INSTALL file for how
    to build them)
  + Keywords are stored to dboxes, and other dbox improvements.
  + dict-sql could actually work now, making quota-in-sql-database possibly
    working now (not fully tested)
  + Added mail storage conversion plugin to convert automatically from one
    mailbox format to another while user logs in. Doesn't preserve UIDVALIDITY/
    UIDs though.
  + Added plugin { .. } section to dovecot.conf for passing parameters to
    plugins (see dovecot-example.conf).
  + Added ssl-build-param binary which is used to generate ssl-parameters.dat.
    Main dovecot binary doesn't anymore link to SSL libraries, and this also
    makes the process title be clearer about why the process is eating all the
    CPU.
  - Fix building without OpenSSL
  - Fixed memory leak in MySQL driver
  - Fixes to checkpassword
  - Broken Content-Length header could have broken mbox opening
  - Fixed potential hangs after APPEND command
  - Fixed potential crashes in dovecot-auth and imap/pop3-login
  - zlib plugin now links with -lz so it could actually work
  - kqueue fixes by Vaclav Haisman

Also, change the package's name to 1.0beta3 (from 1.0b2), since "beta" \ 
is what
pkgsrc recognizes according to pkg_info(1).  (sorry tv, I thought it was \ 
"b".)