lock the endpoint region list before removing all of them on close, just in case...
lock the endpoint region list before removing all of them on close, just in case...

git-svn-id: 29c1264a5cf5e3532df57b06678e7347571c1a3c@1029 f1ba3bf5-cb5c-402b-92a9-7c6bdc83a356

ananos/open-mx,ananos/open-mx,ananos/xen2mx,ananos/xen2mx,ananos/open-mx,ananos/xen2mx,ananos/xen2mx