[FIX] config: don't save deprecated longpolling-port

Longpolling port is replaced with gevent port and is deprecated
This commit avoid saving the value.

Not really usefull but when saved the value was None leadind to an error
when casting to int. The default value should be an int.

closes odoo/odoo#100991

X-original-commit: adac9a9ceaa173c0181a4fc57d0ea83b7a37fc71
Signed-off-by: Christophe Monniez (moc) <moc@odoo.com>
Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>

odoo/tools/config.py

@@ -85,7 +85,8 @@ class configmanager(object):
         # Not exposed in the configuration file.
         self.blacklist_for_save = set([
             'publisher_warranty_url', 'load_language', 'root_path',
-            'init', 'save', 'config', 'update', 'stop_after_init', 'dev_mode', 'shell_interface'
+            'init', 'save', 'config', 'update', 'stop_after_init', 'dev_mode', 'shell_interface',
+            'longpolling_port',
         ])
 
         # dictionary mapping option destination (keys in self.options) to MyOptions.
@@ -135,7 +136,7 @@ class configmanager(object):
                               "Keep empty to listen on all interfaces (0.0.0.0)")
         group.add_option("-p", "--http-port", dest="http_port", my_default=8069,
                          help="Listen port for the main HTTP service", type="int", metavar="PORT")
-        group.add_option("--longpolling-port", dest="longpolling_port", my_default=None,
+        group.add_option("--longpolling-port", dest="longpolling_port", my_default=0,
                          help="Deprecated alias to the gevent-port option", type="int", metavar="PORT")
         group.add_option("--gevent-port", dest="gevent_port", my_default=8072,
                          help="Listen port for the gevent worker", type="int", metavar="PORT")