Log Message:
Update wl to 2.12.2.
Patch submitted by FUKAUMI Naoki (PR pkg/29043).

* Changes in 2.12.2 from 2.10.1
 - Now Maildir is usable on Windows systems.
 - Fixed the problem of the cache flag inconsistency on the filter folder etc.
 - Fixed the bug that the new flag cannot be changed in some cases.
 - Fixed the bug that flag are not taken over correctly from Maildir.
 - Fixed the problem in display module for IMAP messages.
 - Fixed the problem that %INBOX is not appeared as a subfolder of %INBOX.
 - Now user defined flags are appeared in the completions for search conditions.
 - Fixed the problem that a wrong flag folders are created by some flag names.
 - Now expansion of the access group "@/" works correctly.
 - Fixed the problem to cause an error on automatic draft saving.
 - Fixed the problem to cause an error on invoking address manager.
 - Fixed the problem in the flag inheritance function of the filter folder.
 - Improved redisplay functions for "H" and "M" key.
 - Now attributes for netnews are displayed in the draft preview.
 - The structure of the message database is improved.
 - The temporary mark and corresponding action is now customizable.
 - SPAM filter module is added.
 - 'mark folder is renamed to 'flag folder.
 - Now you can put arbitrary user defined flag on message.
 - New marks, 'A' and 'a' are added for answered messages.
 - New mark,s 'F' and 'f' are added for forwarded messages.
 - New search condition 'Flag' (Status of the message) is added.
 - Draft save function is improved.
 - Automatically save draft buffers by using idle-timer.
 - 'H' key(display all header) and 'M' key(display without MIME analysis)
   are now toggle key.
 - Now you can sort summary lines into descending order.
 - Abbreviate too long header extended to lines in message buffer.
 - Persistent mark string in summary buffer is changed.
 - It displays draft preview on sending confirmation.
 - Sending parameters are displayed on draft preview.
 - You can run biff with idle-timer by setting wl-biff-use-idle-timer.
 - Now wl-draft-kill confirms with yes-or-no-p.
 - Summary thread will be divided if its depth is larger than certain amount.
   The limit is controlled by the variable wl-summary-max-thread-depth.
 - Emacs multi-tty support is supported.
 - New sort spec 'size' is added in the summary mode.
 - The variable wl-refile-policy-alist is abolished.
 - Batch processing module is added.
 - In the multi-folder, status of messages are synchronized with original
   folder.
 - The function wl-summary-resend-message is abolished.
 - Variables renamed
   wl-delete-folder-alist is renamed to wl-dispose-folder-alist.
 - POP3 folder existence check is simplified (by default).
 - POP3 response code extension defined in the RFC2449 is supported.
 - IMAP4 commands EXPUNGE and CHECK are now send asynchronously.
 - Default value of wl-folder-hierarchy-access-folders has been changed.
 - Access group "@/" of shimbun folders can be used now.
 - Show contents of NEWS(.ja) when you start Wanderlust newer than the
   one you used previously.
 - Default values of wl-draft-reply-*-list are changed.
 - wl-draft-reply-myself-*-list are abolished and integrated into
   wl-draft-reply-*-list.
 - You can control initial cursor position for replying draft.
 - Changed the way to specify configuration of draft buffer window.
 - Commands to verify/decrypt non-MIME PGP message are added.
 - New options
   wl-summary-resend-use-cache
   elmo-network-session-idle-timeout
 - New hooks
    wl-draft-reply-hook
    wl-summary-reply-hook
    wl-draft-forward-hook
    wl-summary-forward-hook
    wl-draft-kill-pre-hook
    wl-summary-resend-hook
 - Abolished hook
    wl-reply-hook
 - New face
    wl-highlight-summary-disposed-face
    wl-highlight-summary-prefetch-face
    wl-highlight-summary-resend-face
    wl-highlight-summary-answered-face
    wl-highlight-action-argument-face
 - Abolished face
    wl-highlight-refile-destination-face
    (renamed to wl-highlight-action-argument-face)