Log Message:
Update libupnp to 1.6.3.

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Version 1.6.3
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2007-12-25 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Using pthread flags for the whole project, not just at the places
	individually indicated by several Makefile.am files spread all over
	the directories. That was too much error prone.

2007-12-24 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Added a configure test to check if pthread_rwlock_t is available.
	Define _GNU_SOURCE if needed. The fallback behaviou will only be
	implemented if _GNU_SOURCE prooves to be insufficient on some
	platforms. Thanks to Jonathan Casiot (no_dice) and Robert Gingher
	(robsbox).

2007-12-17 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Removed unused iasnprintf.{c,h} files.

2007-12-17 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Removed STATSONLY() macro from ThreadPool.{c,h}.
	* Removed time() usage from ThreadPool.c.
	* Fixed STATS = 0 compilation.

2007-12-16 Marcelo Jimenez <mroberto(at)users.sourceforge.net>
	* Library was not compiling on FreeBSD 7. Code now no longer uses
	ftime(), using gettimeofday() instead. Thanks to Josh Carroll.