ENH: Use FIND_PACKAGE instead of INCLUDE(Find...

Modules/FindQt.cmake

@@ -205,7 +205,7 @@ IF(QT_FOUND)
   SET (QT_UIC_EXE ${QT_UIC_EXECUTABLE} )
   # for unix add X11 stuff
   IF(UNIX)
-    INCLUDE(FindX11)
+    FIND_PACKAGE(X11)
     IF (X11_FOUND)
       SET (QT_LIBRARIES ${QT_LIBRARIES} ${X11_LIBRARIES})
     ENDIF (X11_FOUND)
@@ -214,7 +214,7 @@ IF(QT_FOUND)
     ENDIF (CMAKE_DL_LIBS)
   ENDIF(UNIX)
   IF(QT_QT_LIBRARY MATCHES "qt-mt")
-    INCLUDE(FindThreads)
+    FIND_PACKAGE(Threads)
     SET(QT_LIBRARIES ${QT_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
   ENDIF(QT_QT_LIBRARY MATCHES "qt-mt")
 ENDIF(QT_FOUND)