Update references specifying "Macintosh" to mean OS X semantics and not Mac OS
9.

Applies patch #1095802.  Thanks Jack Jansen.
diff --git a/Doc/lib/libsite.tex b/Doc/lib/libsite.tex
index 13a4909..cfc17d1 100644
--- a/Doc/lib/libsite.tex
+++ b/Doc/lib/libsite.tex
@@ -16,9 +16,9 @@
 It starts by constructing up to four directories from a head and a
 tail part.  For the head part, it uses \code{sys.prefix} and
 \code{sys.exec_prefix}; empty heads are skipped.  For
-the tail part, it uses the empty string (on Macintosh or Windows) or
+the tail part, it uses the empty string (on Windows) or
 it uses first \file{lib/python\shortversion/site-packages} and then
-\file{lib/site-python} (on \UNIX).  For each of the distinct
+\file{lib/site-python} (on \UNIX and Macintosh).  For each of the distinct
 head-tail combinations, it sees if it refers to an existing directory,
 and if so, adds it to \code{sys.path} and also inspects the newly added 
 path for configuration files.