gitweb: use {url} as entrypoint in notfound.tmpl instead of /

gitweb: use {url} as entrypoint in notfound.tmpl instead of /

--- a/templates/gitweb/notfound.tmpl	Sat Mar 08 17:19:18 2008 -0800
+++ b/templates/gitweb/notfound.tmpl	Sat Mar 08 17:28:25 2008 -0800
@@ -12,7 +12,7 @@
 The specified repository "{repo|escape}" is unknown, sorry.
 <br/>
 <br/>
-Please go back to the <a href="/">main repository list page</a>.
+Please go back to the <a href="{url}">main repository list page</a>.
 </div>
 
 {footer}