fix for demo.py to make it use configured host address

Author: rouilj

CHANGES.txt

@@ -34,7 +34,8 @@ Fixed:
   Footer: link fixed and hardcoded last modfied date removed. (Bernhard Reiter)
 - demo.py tracker home is configurable, its location is printed and
   the directory is fully erased when nuking (anatoly techtonik)
-
+- demo.py changing hostname in config.ini actually changes the address
+  where demo.py listens. (John Rouillard)
 
 2012-12-21: 1.4.21
 

demo.py

@@ -136,7 +136,7 @@ def run_demo(home):
 ''' % dict(url=url, script=sys.argv[0], datadir=TRACKER_HOME)
 
     # disable command line processing in roundup_server
-    sys.argv = sys.argv[:1] + ['-p', str(port), 'demo=' + home]
+    sys.argv = sys.argv[:1] + ['-p', str(port), '-n', hostname, 'demo=' + home]
     roundup_server.run(success_message=success_message)