doc: Populate the 'cli' section

Per the spec [1]:

  cli/ – command line tool reference docs, similar to man pages These
  may be automatically generated with cliff's sphinx integration, or
  manually written when auto-generation is not possible.

All of the docs currently found in 'man' fit that category, so those and
those alone are moved. It'll be a great day in the parish when we can
replace all of these with cliff's Sphinx integration.

[1] specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration

Change-Id: I45bed324ec37cfea7c1a574ec06af38e7b875a1c

doc/source/cli/nova-rootwrap.rst

@@ -0,0 +1,58 @@
+=============
+nova-rootwrap
+=============
+
+-----------------------
+Root wrapper for Nova
+-----------------------
+
+:Author: openstack@lists.openstack.org
+:Date:   2012-09-27
+:Copyright: OpenStack Foundation
+:Version: 2012.1
+:Manual section: 1
+:Manual group: cloud computing
+
+SYNOPSIS
+========
+
+  nova-rootwrap [options]
+
+DESCRIPTION
+===========
+
+Filters which commands nova is allowed to run as another user.
+
+To use this, you should set the following in nova.conf:
+rootwrap_config=/etc/nova/rootwrap.conf
+
+You also need to let the nova user run nova-rootwrap as root in sudoers:
+nova ALL = (root) NOPASSWD: /usr/bin/nova-rootwrap /etc/nova/rootwrap.conf *
+
+To make allowed commands node-specific, your packaging should only
+install {compute,network}.filters respectively on compute and network
+nodes (i.e. nova-api nodes should not have any of those files
+installed).
+
+
+OPTIONS
+=======
+
+ **General options**
+
+FILES
+========
+
+* /etc/nova/nova.conf
+* /etc/nova/rootwrap.conf
+* /etc/nova/rootwrap.d/
+
+SEE ALSO
+========
+
+* `OpenStack Nova <https://docs.openstack.org/developer/nova>`__
+
+BUGS
+====
+
+* Nova bugs are managed at Launchpad `Bugs : Nova <https://bugs.launchpad.net/nova>`__