fix xpdf
Prune 20 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  astro/openmap
  audio/mad
  deskutils/gnome-main-menu
  devel/py-olefileio_pl
  devel/rubygem-rspec-spies
  editors/mlview
  graphics/libcdr
  graphics/libfreehand00
  mail/dspam-devel
  mail/p5-Email-Stuff
  net-mgmt/check_snmp_pkgvuln
  ports-mgmt/kports-qt4
  ports-mgmt/portaudit
  ports-mgmt/portaudit-db
  print/libmspub
  security/krb5-maint
  textproc/gnome-translate
  www/moodle25
  x11-toolkits/eel
  x11/avant-window-navigator-gnome