Updated openstack/openstack
Project: openstack/keystone  557b5ad3a1fc10c9969df02cf4fe44b2182603c5

Update 'Configure Federation' documentation.

Apache 2.4 becomes more and more popular version of HTTP server.
With its release some options required for proper Shibboleth Service
Provider have changed. This patch updates information about ``ShibRequireAll``
options that is no longer valid under Apache 2.4. It also adds
documentation reference so users can read more about configuring Apache
Virtual Hosts along with Shibboleth Service Provider.

Change-Id: Idbec6690fd1d75f078a6bdcaa6388b885387b45d