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diff --git a/external/vpc/interfaces/interfaces.cpp b/external/vpc/interfaces/interfaces.cpp
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+++ b/external/vpc/interfaces/interfaces.cpp
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+//===== Copyright � 2005-2005, Valve Corporation, All rights reserved. ======//
+//
+// Purpose: A higher level link library for general use in the game and tools.
+//
+//===========================================================================//
+
+#include "tier0/platform.h"
+#include "tier0/dbg.h"
+#include "interfaces/interfaces.h"
+
+
+//-----------------------------------------------------------------------------
+// Tier 1 libraries
+//-----------------------------------------------------------------------------
+ICvar *cvar = 0;
+ICvar *g_pCVar = 0;
+IProcessUtils *g_pProcessUtils = 0;
+static bool s_bConnected = false;
+IPhysics2 *g_pPhysics2 = 0;
+IPhysics2ActorManager *g_pPhysics2ActorManager = 0;
+IPhysics2ResourceManager *g_pPhysics2ResourceManager = 0;
+IEventSystem *g_pEventSystem = 0;
+ILocalize *g_pLocalize = 0;
+
+// for utlsortvector.h
+#ifndef _WIN32
+void *g_pUtlSortVectorQSortContext = NULL;
+#endif
+
+
+
+//-----------------------------------------------------------------------------
+// Tier 2 libraries
+//-----------------------------------------------------------------------------
+IResourceSystem *g_pResourceSystem = 0;
+IRenderDeviceMgr *g_pRenderDeviceMgr = 0;
+IFileSystem *g_pFullFileSystem = 0;
+IAsyncFileSystem *g_pAsyncFileSystem = 0;
+IMaterialSystem *materials = 0;
+IMaterialSystem *g_pMaterialSystem = 0;
+IMaterialSystem2 *g_pMaterialSystem2 = 0;
+IInputSystem *g_pInputSystem = 0;
+IInputStackSystem *g_pInputStackSystem = 0;
+INetworkSystem *g_pNetworkSystem = 0;
+ISoundSystem *g_pSoundSystem = 0;
+IMaterialSystemHardwareConfig *g_pMaterialSystemHardwareConfig = 0;
+IDebugTextureInfo *g_pMaterialSystemDebugTextureInfo = 0;
+IVBAllocTracker *g_VBAllocTracker = 0;
+IColorCorrectionSystem *colorcorrection = 0;
+IP4 *p4 = 0;
+IMdlLib *mdllib = 0;
+IQueuedLoader *g_pQueuedLoader = 0;
+IResourceAccessControl *g_pResourceAccessControl = 0;
+IPrecacheSystem *g_pPrecacheSystem = 0;
+ISceneSystem *g_pSceneSystem = 0;
+
+#if defined( PLATFORM_X360 )
+IXboxInstaller *g_pXboxInstaller = 0;
+#endif
+
+IMatchFramework *g_pMatchFramework = 0;
+IGameUISystemMgr *g_pGameUISystemMgr = 0;
+
+
+//-----------------------------------------------------------------------------
+// Not exactly a global, but we're going to keep track of these here anyways
+//-----------------------------------------------------------------------------
+IRenderDevice *g_pRenderDevice = 0;
+IRenderHardwareConfig *g_pRenderHardwareConfig = 0;
+
+
+//-----------------------------------------------------------------------------
+// Tier3 libraries
+//-----------------------------------------------------------------------------
+IMeshSystem *g_pMeshSystem = 0;
+IStudioRender *g_pStudioRender = 0;
+IStudioRender *studiorender = 0;
+IMatSystemSurface *g_pMatSystemSurface = 0;
+vgui::IInput *g_pVGuiInput = 0;
+vgui::ISurface *g_pVGuiSurface = 0;
+vgui::IPanel *g_pVGuiPanel = 0;
+vgui::IVGui	*g_pVGui = 0;
+vgui::IVGUILocalize *g_pVGuiLocalize = 0;
+vgui::ISchemeManager *g_pVGuiSchemeManager = 0;
+vgui::ISystem *g_pVGuiSystem = 0;
+IDataCache *g_pDataCache = 0;
+IMDLCache *g_pMDLCache = 0;
+IMDLCache *mdlcache = 0;
+IAvi *g_pAVI = 0;
+IBik *g_pBIK = 0;
+IDmeMakefileUtils *g_pDmeMakefileUtils = 0;
+IPhysicsCollision *g_pPhysicsCollision = 0;
+ISoundEmitterSystemBase *g_pSoundEmitterSystem = 0;
+IWorldRendererMgr *g_pWorldRendererMgr = 0;
+IVGuiRenderSurface *g_pVGuiRenderSurface = 0;
+
+
+//-----------------------------------------------------------------------------
+// Mapping of interface string to globals
+//-----------------------------------------------------------------------------
+struct InterfaceGlobals_t
+{
+	const char *m_pInterfaceName;
+	void *m_ppGlobal;
+};
+
+static InterfaceGlobals_t g_pInterfaceGlobals[] =
+{
+	{ CVAR_INTERFACE_VERSION, &cvar },
+	{ CVAR_INTERFACE_VERSION, &g_pCVar },
+	{ EVENTSYSTEM_INTERFACE_VERSION, &g_pEventSystem },
+	{ PROCESS_UTILS_INTERFACE_VERSION, &g_pProcessUtils },
+	{ VPHYSICS2_INTERFACE_VERSION, &g_pPhysics2 },
+	{ VPHYSICS2_ACTOR_MGR_INTERFACE_VERSION, &g_pPhysics2ActorManager },
+	{ VPHYSICS2_RESOURCE_MGR_INTERFACE_VERSION, &g_pPhysics2ResourceManager },
+	{ FILESYSTEM_INTERFACE_VERSION, &g_pFullFileSystem },
+	{ ASYNCFILESYSTEM_INTERFACE_VERSION, &g_pAsyncFileSystem },
+	{ RESOURCESYSTEM_INTERFACE_VERSION, &g_pResourceSystem },
+	{ MATERIAL_SYSTEM_INTERFACE_VERSION, &g_pMaterialSystem },
+	{ MATERIAL_SYSTEM_INTERFACE_VERSION, &materials },
+	{ MATERIAL_SYSTEM2_INTERFACE_VERSION, &g_pMaterialSystem2 },
+	{ INPUTSYSTEM_INTERFACE_VERSION, &g_pInputSystem },
+	{ INPUTSTACKSYSTEM_INTERFACE_VERSION, &g_pInputStackSystem },
+	{ NETWORKSYSTEM_INTERFACE_VERSION, &g_pNetworkSystem },
+	{ RENDER_DEVICE_MGR_INTERFACE_VERSION, &g_pRenderDeviceMgr },
+	{ MATERIALSYSTEM_HARDWARECONFIG_INTERFACE_VERSION, &g_pMaterialSystemHardwareConfig },
+	{ SOUNDSYSTEM_INTERFACE_VERSION, &g_pSoundSystem },
+	{ DEBUG_TEXTURE_INFO_VERSION, &g_pMaterialSystemDebugTextureInfo },
+	{ VB_ALLOC_TRACKER_INTERFACE_VERSION, &g_VBAllocTracker },
+	{ COLORCORRECTION_INTERFACE_VERSION, &colorcorrection },
+	{ P4_INTERFACE_VERSION, &p4 },
+	{ MDLLIB_INTERFACE_VERSION, &mdllib },
+	{ QUEUEDLOADER_INTERFACE_VERSION, &g_pQueuedLoader },
+	{ RESOURCE_ACCESS_CONTROL_INTERFACE_VERSION, &g_pResourceAccessControl },
+	{ PRECACHE_SYSTEM_INTERFACE_VERSION, &g_pPrecacheSystem },
+	{ STUDIO_RENDER_INTERFACE_VERSION, &g_pStudioRender },
+	{ STUDIO_RENDER_INTERFACE_VERSION, &studiorender },
+	{ VGUI_IVGUI_INTERFACE_VERSION, &g_pVGui },
+	{ VGUI_INPUT_INTERFACE_VERSION, &g_pVGuiInput },
+	{ VGUI_PANEL_INTERFACE_VERSION, &g_pVGuiPanel },
+	{ VGUI_SURFACE_INTERFACE_VERSION, &g_pVGuiSurface },
+	{ VGUI_SCHEME_INTERFACE_VERSION, &g_pVGuiSchemeManager },
+	{ VGUI_SYSTEM_INTERFACE_VERSION, &g_pVGuiSystem },
+	{ LOCALIZE_INTERFACE_VERSION, &g_pLocalize },
+	{ LOCALIZE_INTERFACE_VERSION, &g_pVGuiLocalize },
+	{ MAT_SYSTEM_SURFACE_INTERFACE_VERSION, &g_pMatSystemSurface },
+	{ DATACACHE_INTERFACE_VERSION, &g_pDataCache },
+	{ MDLCACHE_INTERFACE_VERSION, &g_pMDLCache },
+	{ MDLCACHE_INTERFACE_VERSION, &mdlcache },
+	{ AVI_INTERFACE_VERSION, &g_pAVI },
+	{ BIK_INTERFACE_VERSION, &g_pBIK },
+	{ DMEMAKEFILE_UTILS_INTERFACE_VERSION, &g_pDmeMakefileUtils },
+	{ VPHYSICS_COLLISION_INTERFACE_VERSION, &g_pPhysicsCollision },
+	{ SOUNDEMITTERSYSTEM_INTERFACE_VERSION, &g_pSoundEmitterSystem },
+	{ MESHSYSTEM_INTERFACE_VERSION, &g_pMeshSystem },
+	{ RENDER_DEVICE_INTERFACE_VERSION, &g_pRenderDevice },
+	{ RENDER_HARDWARECONFIG_INTERFACE_VERSION, &g_pRenderHardwareConfig },
+	{ SCENESYSTEM_INTERFACE_VERSION, &g_pSceneSystem },
+	{ WORLD_RENDERER_MGR_INTERFACE_VERSION, &g_pWorldRendererMgr },
+	{ RENDER_SYSTEM_SURFACE_INTERFACE_VERSION, &g_pVGuiRenderSurface },
+
+#if defined( _X360 )
+	{ XBOXINSTALLER_INTERFACE_VERSION, &g_pXboxInstaller },
+#endif
+
+	{ MATCHFRAMEWORK_INTERFACE_VERSION, &g_pMatchFramework },
+	{ GAMEUISYSTEMMGR_INTERFACE_VERSION, &g_pGameUISystemMgr },
+};
+
+
+//-----------------------------------------------------------------------------
+// The # of times this DLL has been connected
+//-----------------------------------------------------------------------------
+static int s_nConnectionCount = 0;
+
+
+//-----------------------------------------------------------------------------
+// At each level of connection, we're going to keep track of which interfaces
+// we filled in. When we disconnect, we'll clear those interface pointers out.
+//-----------------------------------------------------------------------------
+struct ConnectionRegistration_t
+{
+	void *m_ppGlobalStorage;
+	int m_nConnectionPhase;
+};
+
+static int s_nRegistrationCount = 0;
+static ConnectionRegistration_t s_pConnectionRegistration[ ARRAYSIZE(g_pInterfaceGlobals) + 1 ];
+
+void RegisterInterface( CreateInterfaceFn factory, const char *pInterfaceName, void **ppGlobal )
+{
+	if ( !(*ppGlobal) )
+	{
+		*ppGlobal = factory( pInterfaceName, NULL );
+		if ( *ppGlobal )
+		{
+			Assert( s_nRegistrationCount < ARRAYSIZE(s_pConnectionRegistration) );
+			ConnectionRegistration_t &reg = s_pConnectionRegistration[s_nRegistrationCount++];
+			reg.m_ppGlobalStorage = ppGlobal;
+			reg.m_nConnectionPhase = s_nConnectionCount;
+		}
+	}
+}
+
+void ReconnectInterface( CreateInterfaceFn factory, const char *pInterfaceName, void **ppGlobal )
+{
+	*ppGlobal = factory( pInterfaceName, NULL );
+
+	bool bFound = false;
+	Assert( s_nRegistrationCount < ARRAYSIZE(s_pConnectionRegistration) );
+	for ( int i = 0; i < s_nRegistrationCount; ++i )
+	{
+		ConnectionRegistration_t &reg = s_pConnectionRegistration[i];
+		if ( reg.m_ppGlobalStorage != ppGlobal )
+			continue;
+
+		reg.m_ppGlobalStorage = ppGlobal;
+		bFound = true;
+	}
+
+	if ( !bFound && *ppGlobal )
+	{
+		Assert( s_nRegistrationCount < ARRAYSIZE(s_pConnectionRegistration) );
+		ConnectionRegistration_t &reg = s_pConnectionRegistration[s_nRegistrationCount++];
+		reg.m_ppGlobalStorage = ppGlobal;
+		reg.m_nConnectionPhase = s_nConnectionCount;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Call this to connect to all tier 1 libraries.
+// It's up to the caller to check the globals it cares about to see if ones are missing
+//-----------------------------------------------------------------------------
+void ConnectInterfaces( CreateInterfaceFn *pFactoryList, int nFactoryCount )
+{
+	if ( s_nRegistrationCount < 0 )
+	{
+		Error( "APPSYSTEM: In ConnectInterfaces(), s_nRegistrationCount is %d!\n", s_nRegistrationCount );
+	}
+	else if ( s_nRegistrationCount == 0 )
+	{
+		for ( int i = 0; i < nFactoryCount; ++i )
+		{
+			for ( int j = 0; j < ARRAYSIZE( g_pInterfaceGlobals ); ++j )
+			{
+				RegisterInterface( pFactoryList[i], g_pInterfaceGlobals[j].m_pInterfaceName, (void**)g_pInterfaceGlobals[j].m_ppGlobal );
+			}
+		}
+	}
+	else
+	{
+		// This is no longer questionable: ConnectInterfaces() is expected to be called multiple times for a file that exports multiple interfaces.
+		// Warning("APPSYSTEM: ConnectInterfaces() was called twice for the same DLL.\nThis is expected behavior in building reslists, but questionable otherwise.\n");
+		for ( int i = 0; i < nFactoryCount; ++i )
+		{
+			for ( int j = 0; j < ARRAYSIZE( g_pInterfaceGlobals ); ++j )
+			{
+				ReconnectInterface( pFactoryList[i], g_pInterfaceGlobals[j].m_pInterfaceName, (void**)g_pInterfaceGlobals[j].m_ppGlobal );
+			}
+		}
+	}
+	++s_nConnectionCount;
+}
+
+void DisconnectInterfaces()
+{
+	Assert( s_nConnectionCount > 0 );
+	if ( --s_nConnectionCount < 0 )
+		return;
+
+	for ( int i = 0; i < s_nRegistrationCount; ++i )
+	{
+		if ( s_pConnectionRegistration[i].m_nConnectionPhase != s_nConnectionCount )
+			continue;
+
+		// Disconnect!
+		*(void**)(s_pConnectionRegistration[i].m_ppGlobalStorage) = 0;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Reloads an interface
+//-----------------------------------------------------------------------------
+void ReconnectInterface( CreateInterfaceFn factory, const char *pInterfaceName )
+{
+	for ( int i = 0; i < ARRAYSIZE( g_pInterfaceGlobals ); ++i )
+	{
+		if ( strcmp( g_pInterfaceGlobals[i].m_pInterfaceName, pInterfaceName ) )
+			continue;		
+		ReconnectInterface( factory, g_pInterfaceGlobals[i].m_pInterfaceName, (void**)g_pInterfaceGlobals[i].m_ppGlobal );
+	}
+}