Log Message:
Update sylpheed to 3.2.0.

Changes since Sylpheed 3.1.4
----------------------------

[New features]

      * Each attachments on the message view now have graphical label
        and popup menu.
      * The UI for Attachments tab was changed to save the space. Users
        now also can do 'Save all' without switching the view.
      * The 'show_attach_tab' option (without UI), which reverts the
        attachments interface to the old one, was added.
      * Multiple keywords search of the quick search was implemented.
      * The context menu of the folder view and the summary view can be
        popped up using Menu key or Shift+F10.
      * Win32: IPv6 support was enabled again.
      * Win32: SylFilter is now also included in the installer. The
        default junk commands were also changed to sylfilter.
      * Win32: an option to play sound when new messages arrive was
        added.
      * Win32: The file selector now follows Windows shortcut (.lnk).

[Improvements]

      * Number of maximum characters per line of configuration files
        was increased.
      * Compose window will not be closed if saving of message to
        outbox failed.
      * Sender's e-mail address became not guessable from generated
        Message-Id.
      * New plug-in APIs were added.
      * 'Account Preferences - Advanced - Put deleted messages in'
        account setting actually works now.
      * MIME debug output was modified.
      * Both filtered and original numbers of messages are displayed on
        the status label now.
      * The POP3 remote mailbox now supports SOCKS proxy.
      * The POP3 remote mailbox now retrieves headers from the newer
        messages (useful for slow connection).
      * The POP3 remote mailbox can now reload message headers after
        the loading is stopped.
      * News (NNTP) now supports SOCKS proxy.
      * The details of new message counts are displayed on the tooltip
        of the tray icon.
      * Address auto-completion now also matches to the subsequent part
        of the name of contacts.
      * On file selection dialog, the last selected folders are
        preserved between sessions now.
      * DNS lookup error is now distinguished from other connection
        errors.
      * The clip icon was replaced with more visible one on selected
        row.

[Performance improvements]

      * The performance of reading cache files was improved by using
        memory mapped file (requires GTK+ >= 2.8).
      * Win32: the launch of Windows installer became faster.

[Other changes]

      * Sylfilter command was added as a preset of junk filter program.
      * The blinking period of the tray icon was extended to 10 seconds.
      * 'Is shorter than' became the default for 'Age' filter condition.
      * The Japanse manual was updated, and the encoding of Japanese
        manual was changed to UTF-8 to prevent display failure on some
        browsers.

[Bugfixes]

      * Queue control headers are removed when moving messages from
        queue folders to trash.
      * Duplicated keyboard accelerators on some dialogs were fixed.
      * The focus on quick search entry is not stolen by the refresh of
        summary.
      * The HTML parser was modified.
      * The check of IMAP AUTHENTICATE response was fixed.
      * The compilation failure with GLib 2.32 or later was fixed.
      * The bug that a MIME part that didn't have its name could not be
        saved was fixed.
      * Address autocomplete drop-down list with newer version of GTK+
        was fixed (#52).
      * Line-space for auto-wrapped lines now reflects the line-space
        setting (#64).
      * Some minor fixes for IMAP were made.
      * Some memory leaks were fixed.
      * Other bugfixes were made.
      * Some compiler warnings were removed.
      * Win32: OpenSSL was updated to 0.9.8x. (0.9.8w in Sylpheed 3.1.4
        is also not vulnerable)