Log Message:
Update to SWI-Prolog 5.11.0

Notable changes in SWI-Prolog 5.11.0:

* ODBC now properly handles locale.  This means you can
  use it with Unicode if you use a UTF-8 based locale.

* Recently reported manifest problems around xpce should be
  fixed with help from Degski.

* Message queues can now be destroyed while they have suspended
  writers, making pipe-like cooperation between threads much easier.

* Using set_prolog_flag(qcompile, auto), you can ask the system
  to automatically maintain quick-load versions of your source-files.
  This can greatly improve development comfort for really large
  applications.

* Jeff Rosenwald contributed an interface for Google protocol buffers

Notable changes in SWI-Prolog 5.9.10:

* A lot of stuff has been added to enhance the compatibility to SICStus.
  This involves some changes to the kernel, some additions to the libraries
  and starting and populating a SICStus emulation layer.  All this was
  initiated by the with to make the Alpino NLP parser suite
  (http://www.let.rug.nl/vannoord/alp/Alpino/) available for SWI-Prolog.
  Thanks to Gertjan van Noord, this is now almost reality (there
  are some remaining tweaks, notably with the Tcl/Tk interface).

* Also various enhancements and fixes to the tabbed-editing support for
  the built-in editor.