Do a little bit more to try and add <link> elements to the header, not that

Mozilla 0.9.5 can make intelligent use of them.  Specifically, this causes
the "Acknowledgements" and "Global Module Index" pages to acquire "up"
links in the Mozilla "Site Navigation Bar".
This partially responds to SF bug #469772.

Doc/tools/support.py

@@ -87,7 +87,16 @@ class Options:
         raise getopt.error("option %s not recognized" % opt)
 
     def get_header(self):
-        return HEAD % self.variables
+        s = HEAD % self.variables
+        if self.uplink:
+            if self.uptitle:
+                link = ('<link rel="up" href="%s" title="%s">'
+                        % (self.uplink, self.uptitle))
+            else:
+                link = '<link rel="up" href="%s">' % self.uplink
+            repl = "  %s\n</head>" % link
+            s = s.replace("</head>", repl, 1)
+        return s
 
     def get_footer(self):
         return TAIL % self.variables