Replace some occurrences of wxUSE_STL with wxUSE_STD_CONTAINERS

The latter option will remain, while the former one won't be used at all
any longer soon, so prefer using the latter whenever possible.

docs/doxygen/mainpages/const_wxusedef.h

@@ -27,8 +27,9 @@ This table summarizes some of the global build features affecting the entire
 library:
 
 @beginDefList
-@itemdef{wxUSE_STL, Container classes and wxString are implemented using
-    standard classes and provide the same standard API.}
+@itemdef{wxUSE_STD_CONTAINERS, Container classes are implemented using
+    standard classes (while still providing some compatibility with legacy
+    wxWidgets container classes).}
 @itemdef{wxUSE_UNICODE, Always defined as 1 in wxWidgets 3.3 and later, only
     exists for compatibility.}
 @itemdef{wxUSE_UNICODE_WCHAR, wxString uses wchar_t buffer for internal storage

docs/msw/install.md

@@ -385,8 +385,8 @@ The full list of the build settings follows:
   different setup.h settings coexisting in same tree. The value of
   this option is appended to the build directories names. This is
   useful for building the library in some non-default configuration,
-  e.g. you could change `wxUSE_STL` to 1 in `%%WXWIN%\include\wx\msw\setup.h` and
-  then build with `CFG=-stl`. Alternatively, you could build with e.g.
+  e.g. you could change `wxUSE_STD_CONTAINERS` to 0 in `%%WXWIN%\include\wx\msw\setup.h` and
+  then build with `CFG=-nonstd`. Alternatively, you could build with e.g.
   `RUNTIME_LIBS=static CFG=-mt` when using MSVC.
 
 * `COMPILER_PREFIX=<string>`

samples/propgrid/propgrid.cpp

@@ -1669,7 +1669,7 @@ void FormMain::PopulateWithLibraryConfig ()
     ADD_WX_LIB_CONF_GROUP("Global Features")
     ADD_WX_LIB_CONF( wxUSE_EXCEPTIONS )
     ADD_WX_LIB_CONF( wxUSE_EXTENDED_RTTI )
-    ADD_WX_LIB_CONF( wxUSE_STL )
+    ADD_WX_LIB_CONF( wxUSE_STD_CONTAINERS )
     ADD_WX_LIB_CONF( wxUSE_LOG )
     ADD_WX_LIB_CONF( wxUSE_LOGWINDOW )
     ADD_WX_LIB_CONF( wxUSE_LOGGUI )

tests/lists/lists.cpp

@@ -200,7 +200,7 @@ void ListsTestCase::wxListCtorTest()
         CPPUNIT_ASSERT( list2.GetCount() == 2 );
         CPPUNIT_ASSERT( Baz::GetNumber() == 2 );
 
-#if !wxUSE_STL
+#if !wxUSE_STD_CONTAINERS
         list1.DeleteContents(true);
 #else
         WX_CLEAR_LIST(wxListBazs, list1);