change stackforge url to openstack url

beacuse of the stackforge project move to openstack project,
so change the document url to git://git.openstack.org/openstack/.

Change-Id: I1628c0aeb62ee519867fdaee56386e22978c4271
diff --git a/doc/source/plugin-registry.rst b/doc/source/plugin-registry.rst
index eb09988..49b3a7f 100644
--- a/doc/source/plugin-registry.rst
+++ b/doc/source/plugin-registry.rst
@@ -68,7 +68,7 @@
 | Plugin Name | URL                                                        | Comments   |
 |             |                                                            |            |
 +-------------+------------------------------------------------------------+------------+
-|glusterfs    |git://git.openstack.org/stackforge/devstack-plugin-glusterfs|            |
+|glusterfs    |git://git.openstack.org/openstack/devstack-plugin-glusterfs |            |
 +-------------+------------------------------------------------------------+------------+
 |             |                                                            |            |
 +-------------+------------------------------------------------------------+------------+
@@ -80,7 +80,7 @@
 | Plugin Name    | URL                                              | Comments   |
 |                |                                                  |            |
 +----------------+--------------------------------------------------+------------+
-|ec2-api         |git://git.openstack.org/stackforge/ec2api         |[as1]_      |
+|ec2-api         |git://git.openstack.org/openstack/ec2-api         |[as1]_      |
 +----------------+--------------------------------------------------+------------+
 |ironic-inspector|git://git.openstack.org/openstack/ironic-inspector|            |
 +----------------+--------------------------------------------------+------------+