Log Message:
Update security/caff to 0.4.5

Changelog:
  * Update FSF addresses.
  * caff: tweak documentation.
  * caff: note that mailed keys are encrypted (suggested by Sune Vuorela).
  * caff: You can now specify additional arguments to pass to the
    send method of Mail::Mailer.  This allows you to send mails via
    SMTP and use authentication for instance.  Thanks to Martin von Gagern.
  * gpg-key2ps, keylookup: make them less dependent on specific
    installation paths and thus better portable outside of Debian
    (Closes: #354142).