Log Message:
Update libupnp to 1.6.4.

Changes:
*******************************************************************************
Version 1.6.4
*******************************************************************************

2008-01-23 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Workaround for a problem with the new automake AM_CONDITIONAL macro
	from autotools-1.10. Thanks to Ingo Hofmann for helping with debugging
	this one.

2008-01-22 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Added quoting to macros AC_CONFIG_AUX_DIR, AC_CONFIG_MACRO_DIR and
	AC_CONFIG_SRCDIR in configure.ac. Also changed the name of the
	auxiliary directory in AC_CONFIG_AUX_DIR to build-aux.

2008-01-22 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Fix for setsockopt() in Threadpool.c to allow more than one process
	to join the multicast-group on OSX. Thanks to Ingo Hofmann.

2008-01-22 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Using defined(__OSX__) || defined(__APPLE__) instead of just
	defined(__OSX__) in the code. Thanks to Ingo Hofmann and Chris
	Pickel.

2008-01-21 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Fix for isFileInVirtualDir. Thanks to Peter Hartley for the patch.

2008-01-07 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Putting back a "defined(__OSX__)" that has been removed in the
	previous *BSD patch. Thanks to Chris Pickel for pointing it out.

2008-01-07 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* SF Patches Tracker [ 1865812 ] typo in docs comment
	Submitted By: Hartmut Holzgraefe - hholzgra
	typo in docs comment ACCAPTED instead of ACCEPTED in
	@name UPNP_E_UNSUBSCRIBE_UNACCAPTED [-302]
	Also, the documentation file name was mispelled and was corrected in
	the Makefile.am.