Ulink urls in Docbook need to be html-escaped.

[Per Bothner]

An '&' in a uref needs to be escaped in Docbook, when it
becomes a url attribute in a ulink element.

I don't know if the attached patch is the right fix, but it
seems to work.
--
        --Per Bothner
address@hidden   http://per.bothner.com/

2005-02-05  Per Bothner  <address@hidden>

        * makeinfo/xref.c (cm_uref): Ulink urls in Docbook need to be 
html-escaped.

--- xref.c~     2004-12-21 09:28:35.000000000 -0800
+++ xref.c      2005-02-05 00:50:33.128597754 -0800
@@ -495,7 +495,7 @@ cm_uref (int arg)
       if (docbook)
         {
           xml_insert_element_with_attribute (UREF, START, "url=\"%s\"",
-              text_expansion (url));
+                                            maybe_escaped_expansion (url, 0, 
1));
           if (*replacement)
             execute_string ("%s", replacement);
           else if (*desc)