Update software fallback GL name

Change-Id: I314327d292e45007fccf3872de320e4cc4e875b9
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

doc/src/platforms/windows.qdoc

@@ -225,7 +225,7 @@
     provides OpenGL 2 functions. If these are present, opengl32.dll is used,
     otherwise the ANGLE libraries will be used. In case the ANGLE libraries are
     missing or initialization fails for some reason, an additional fallback is
-    attempted by trying to load \c{QtSoftwareOpenGL.dll}. See below for details.
+    attempted by trying to load \c{opengl32sw.dll}. See below for details.
 
     The loading mechanism can be configured through the \c{QT_OPENGL}
     environment variable and the following application attributes:
@@ -260,7 +260,7 @@
 
     \c Qt::AA_UseSoftwareOpenGL is special in the sense that it will try to load
     an OpenGL implementation with a non-standard name. The default name is
-    \c{QtSoftwareOpenGL.dll}. This allows shipping a software-only OpenGL
+    \c{opengl32sw.dll}. This allows shipping a software-only OpenGL
     implementation, for example a build of
     \l{http://www.mesa3d.org/llvmpipe.html}{Mesa with llvmpipe}, under this
     name. If necessary, the filename can be overridden by setting the