The idea of the scripts here are to send e-mail notification of
new and current mails, or to forward those mails to a mail address
with MIME.

   notify.sh
      parameters: to from mail_file
         - if .e-mail-address exists
            - if .notify-each-message exists
                 send notification for new message by mail.
            - else if .copy-each-message exists
                 send a copy of message by MIME/mail
            - else if .forward-each-message exists
                 send message by MIME/mail, delete message
      BUGS
         - E-mail address should be filtered by WWW gateway.

      This is called through mvm_low_level_function.sh's send_voice_mail
      function.

   recall.sh
      parameters: NONE
      for `expand_mailboxes.sh`.
         - if .e-mail-address exists
            - if .recall-daily exists
               - scan all mails for that user
                  - send e-mail list to that e-mail

      This is run once a day from crontab.

BUGS
   - crontab also should be tested: currently there are missing
     functions needed by recall.sh:
        - eval_voice_mails_list
        - eval_voice_mailbox_list
        - generate_detailed_voice_mails_list
     Maybe use generic function usable with WWW too.

