Update URL for Bison Windows version

It used to be part of Git for Windows. It no longer is.

diff --git a/doc/book.xml b/doc/book.xml
index 35b13d3..8bb42c0 100644 (file)
--- a/doc/book.xml
+++ b/doc/book.xml
@@ -969,8 +969,8 @@
        (<filename>cql.y</filename>).
        </para>
        <para>
-       A Windows version of GNU Bison is part of
-       <ulink url="&url.gitwindows;">Git for Windows</ulink>.
+       A Windows version of GNU Bison can be fetched from here:
+       <ulink url="http://ftp.indexdata.dk/pub/support/windows/bison-2.4.1-setup.exe"/>.
        </para></listitem>
       </varlistentry>
       <varlistentry>