Fix a loooong-standing brainfart: I got the site-packages path for

Python 1.5.2 wrong in the section on config files.

Doc/inst/inst.tex

@@ -810,7 +810,7 @@ And on Mac OS, they are:
   in the directory where the Distutils are installed; under Python 1.6
   and later on \UNIX, this is as shown. For Python 1.5.2, the Distutils
   will normally be installed to
-  \file{\filevar{prefix}/lib/site-packages/python1.5/distutils},
+  \file{\filevar{prefix}/lib/python1.5/site-packages/distutils},
   so the system configuration file should be put there under Python
   1.5.2.
 \item[(2)] On \UNIX, if the \envvar{HOME} environment variable is not