Version 2.8.1
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* Fix integer overflows (Discovered in xpdf by Chris Evans, Patch by
  Dan Williams) - CAN 2004-0888, #156729

* Fix some crashes with http URLs. (Mark McLoughlin) - #153159, #151364

* Check for NULL BonoboControlFrames. (Loic Minier) - (#151364)

* Handle not-installed schemas better. (Muktha Narayan, Martin) - #151172

* Translation updates: Meelad Zakaria (fa), Jesus Bravo Alvarez (gl),
  Christophe Merlet (fr), Mohammad DAMT (id), Martin Willemoes Hansen (da)