Include Linux flashlight-effect workaround

For some reason BorderColor-supports seems to be advertised although it
apparently is not (fully?) supported. At least on my system the
flashlight doesn't draw completely using the bordered texture.
To work around the issue where it exists this adds a ConVar to forcibly
disable the bordered version.

sp/src/game/client/flashlighteffect.cpp

@@ -38,6 +38,7 @@ static ConVar r_swingflashlight( "r_swingflashlight", "1", FCVAR_CHEAT );
 static ConVar r_flashlightlockposition( "r_flashlightlockposition", "0", FCVAR_CHEAT );
 #ifdef EZ
 static ConVar r_nvgfov( "r_nvgfov", "100", FCVAR_CHEAT ); // Breadman - Changed for NVG effect
+static ConVar r_nvg_force_nonbordered( "r_nvg_force_nonbordered", "0" ); // z33ky - workaround for Linux issue with bordercolor-support detection
 #endif
 static ConVar r_flashlightfov( "r_flashlightfov", "45.0", FCVAR_CHEAT );
 static ConVar r_flashlightoffsetx( "r_flashlightoffsetx", "10.0", FCVAR_CHEAT );
@@ -93,7 +94,7 @@ CFlashlightEffect::CFlashlightEffect(int nEntIndex)
 	}
 #ifdef EZ
 	m_iFlashLightType = type;
-	if ( g_pMaterialSystemHardwareConfig->SupportsBorderColor() && IsNVG() )
+	if ( g_pMaterialSystemHardwareConfig->SupportsBorderColor() && !r_nvg_force_nonbordered.GetBool() && IsNVG() )
 	{
 		m_FlashlightTexture.Init( "effects/Ez_MetroVision_border", TEXTURE_GROUP_OTHER, true );
 	}
@@ -617,4 +618,4 @@ void CHeadlightEffect::UpdateLight( const Vector &vecPos, const Vector &vecDir,
 	}
 
 	g_pClientShadowMgr->UpdateProjectedTexture( GetFlashlightHandle(), true );
-}
+}