Sync Mk with ports
Prune 17 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  devel/gconfmm
  devel/libglademm
  devel/lua50-app
  devel/lua50-compat51
  devel/lua50-filename
  devel/lua50-gettext
  devel/lua50-posix
  devel/lua50-pty
  graphics/libgnomecanvasmm
  lang/lua50
  lang/tolua++50
  lang/tolua50
  multimedia/tovid
  net/lua50-luasocket
  security/squidclamav
  x11-toolkits/libgnomeuimm
  x11/libgnomemm
Update misc/pciids to version 20131115
Update devel/boehm-gc to version 7.2e
Tweak archivers/gtar version 1.27
Update lang/perl5.16 to version 5.16.3_3
Tweak audio/faad version 2.7_4,1
Tweak databases/pecl-memcache version 3.0.8
Tweak textproc/p5-SVG version 2.59
Tweak textproc/p5-Spreadsheet-WriteExcel version 2.40
Tweak audio/faac version 1.28_2
Tweak databases/py-sqlalchemy-migrate version 0.7.2
Tweak audio/libgme version 0.5.5
Tweak textproc/p5-Pod-Parser version 1.61
Tweak textproc/silvercity version 0.9.7
Tweak www/py-beaker version 1.6.4
Tweak textproc/py-mako version 0.9.0
Update devel/pear-Horde_Stream to version 1.5.0
Update lang/gcc48 to version 4.8.3.s20131114
Tweak textproc/p5-XML-Handler-Trees version 0.02