Added thread id in process id display.

lib/python/App/debug.dtml

@@ -29,7 +29,7 @@ font-size: 10pt;
 <li>Zope version: <!--#var version_txt-->
 <li>Python version: <!--#var sys_version-->
 <li>System Platform: <!--#var sys_platform-->
-<li>Process ID: <!--#var process_id-->
+<li>Process ID: <!--#var process_id--> (<!--#var thread_get_ident-->)
 <li>Running for: <!--#var process_time-->
 <li>Top Refcounts: <select name="foo"><!--#in 
     "refcount(100)"--><option><!--#var