Put Lib/lib-old back on to sys.path for module renames.

Makefile.pre.in

@@ -814,7 +814,9 @@ LIBSUBDIRS=	lib-tk site-packages test test/output test/data \
 		lib2to3 lib2to3/fixes lib2to3/pgen2 \
 		ctypes ctypes/test ctypes/macholib idlelib idlelib/Icons \
 		distutils distutils/command distutils/tests $(XMLLIBSUBDIRS) \
-		setuptools setuptools/command setuptools/tests setuptools.egg-info \
+		setuptools setuptools/command setuptools/tests \
+		setuptools.egg-info \
+		lib-old \
 		curses $(MACHDEPS)
 libinstall:	build_all $(srcdir)/Lib/$(PLATDIR)
 	@for i in $(SCRIPTDIR) $(LIBDEST); \

Misc/NEWS

@@ -76,6 +76,8 @@ Library
 Build
 -----
 
+- ``Lib/lib-old`` is now added to sys.path.
+
 What's New in Python 2.6 alpha 3?
 =================================
 

Modules/Setup.dist

@@ -98,7 +98,10 @@ EXTRAMACHDEPPATH=
 # The TKPATH variable is always enabled, to save you the effort.
 TKPATH=:lib-tk
 
-COREPYTHONPATH=$(DESTPATH)$(SITEPATH)$(TESTPATH)$(MACHDEPPATH)$(EXTRAMACHDEPPATH)$(TKPATH)
+# Path component for old modules.
+OLDPATH=:lib-old
+
+COREPYTHONPATH=$(DESTPATH)$(SITEPATH)$(TESTPATH)$(MACHDEPPATH)$(EXTRAMACHDEPPATH)$(TKPATH)$(OLDPATH)
 PYTHONPATH=$(COREPYTHONPATH)