Log Message:
Update spamprobe to version 1.4.
Submitted by Ossi 'ohub' Herrala <oherrala@ee.oulu.fi> in private mail
as discussed on IRCnet #NetBSD.

Changes to software:
 * Spamprobe has a config file!
 * Added comprehensive command line option help.
 * Added support for maildir directories to all file based commands.
 * Added support for auto-purge (-P command line option).
 * Commands create-db and create-config to greate database and config
   file.
 * Added gif parser support using libungif to analyzes image
   attachments and derive useful information from them.

Changes to package:
 * bdb is not in SUGGESTED_OPTIONS anymore.
 * added depency to graphics/libungif and gif is in SUGGESTED_OPTIONS.