Log Message:
Update mew to 5.1.  PR pkg/34556 from KIRIHARA Masaharu <mki_open at yahoo
dot co dot jp>.

Changes excerpted from 00diff:

			    <Differences>
			    Kazu Yamamoto
			     Jul 5, 2006

	      <Differences between Mew 5.1 and Mew 4.2>

* The ".mew" suffix is introduced for OS level search mechanisms.
* OS level search mechanisms including Spotlight, Windows Desktop
  Search, Google Desktop are integrated.
* The mechanism of master password was implemented.
  Set mew-use-master-passwd to t to use it.
* When sending a message, if your SMTP server requires user
  authentication, Mew asks you to input your password. You don't have
  to configure mew-smtp-user anymore.
* In Draft mode, addresses which are not considered safe turn red.
  See mew-safe-addresses, mew-warn-addresses, mew-safe-domains, and
  mew-warn-domains.
* You can securely save your passwords to a file with a master
  password.
* "li" copies a message to an IMAP folder.
* "I" now works in Thread mode.
* "C-cC-e" in Summary has been drastically improved.
* "C-cC-t" and "C-cC-y" in Summary were obsoleted.
* 'mew-inbox-action-alist' can be set in 'mew-config-alist'.
* "v" in Summary mode displays line numbers when off.
* "C-uj" in Summary mode jumps to the message whose message number is
  specified.
* "C-uB" decomposes any attached files.
* If you want to put the 'D' mark to duplicated messages
  whose boyies are identical (ie spams), set
  mew-summary-form-mark-spam to t.
* All variables can be defined in ".mew.el". You don't have to
  set specific variables in ".emacs".