patch from Toshio adding support to use passwd auth for database connection.

hub/httpd.conf

@@ -10,6 +10,7 @@ Alias /kojihub "/usr/share/koji-hub/XMLRPC"
         PythonOption DBName koji
         PythonOption DBUser koji
         PythonOption DBHost db.example.com
+        PythonOption DBPass example_password
         PythonOption KojiDir /mnt/koji
 
         # Kerberos auth configuration

hub/kojixmlrpc.py

@@ -288,6 +288,7 @@ def handler(req, profiling=False):
             context.req = req
             koji.db.provideDBopts(database = opts["DBName"],
                                   user = opts["DBUser"],
+                                  password = opts.get("DBPass",None),
                                   host = opts.get("DBhost",None))
             try:
                 context.cnx = koji.db.connect(opts.get("KojiDebug",False))