Force language on donations link

git-svn-id: http://svn.code.sf.net/p/davmail/code/trunk@2159 3d1905a2-6b24-0410-a738-b14d5a86fcbd

src/site/xdoc/index.xml

@@ -48,7 +48,7 @@
                                     src="http://www.ohloh.net/p/106265/widgets/project_thin_badge.js">
                             </script>
                         </div>
-                        <a class="donate" href="https://sourceforge.net/donate/index.php?group_id=184600"
+                        <a class="donate" href="https://www.paypal.com/cgi-bin/webscr?item_name=Donation+to+DavMail+POP%2FIMAP%2FSMTP%2FCaldav+to+Exchange&amp;cmd=_donations&amp;business=mguessan%40free.fr&amp;lc=US"
                            title="Donate">
                             Donate
                         </a>