Log Message:
Update libupnp to 1.6.13.

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Version 1.6.13
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2011-03-15 Fabrice Fontaine <fabrice.fontaine(at)orange-ftgroup.com>

	Putting ssdpReqSocks under compilation flag.

	Putting all access to ssdpReqSock4 and ssdpReqSock6 under
	INCLUDE_CLIENT_APIS compilation flag to be able to compile when
	client part of library is disable.

2011-03-15 Fabrice Fontaine <fabrice.fontaine(at)orange-ftgroup.com>

	New UpnpRegisterRootDevice4 for legacy CPs.

	Add a new UpnpRegisterRootDevice4 which allow user to specify a
	description URL to be returned for legacy CPs (for example, CPs
	searching for a v1 when the device is v2). Most of those CPs does not
	work if they found a v2 in the XML description, so this new function is
	only used to solve interoperability issues.

2011-03-08 Iain Denniston <iain.denniston(at)gmail.com>
	Fix for memory leak.

2011-03-08 Iain Denniston <iain.denniston(at)gmail.com>
	Fix and Update of MSVC9 solution and project files - now compile in all
	modes. Added x64 and static library targets.

2011-03-08 Iain Denniston <iain.denniston(at)gmail.com>
	Partial fix for UpnpGetIfInfo with MSVC - convert wchar string to
	char string (full fix requires a lot of work - potentially impacting
	all supported platforms)

2011-03-11 Marcelo Roberto Jimenez <mroberto(at)users.sourceforge.net>

	Created the macros PRIzd and PRIzx to deal with MSVC lack of C99.
	Thanks to Iain Denniston for pointing it out.

2011-03-08 Iain Denniston <iain.denniston(at)gmail.com>

	Fixes for headers when compiled under C++

2011-03-08 Iain Denniston <iain.denniston(at)gmail.com>

	Fix for uuid_unpack incorrect shift precedence.