Add RST version of ganeti-noded man page

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

man/ganeti-noded.rst

+ganeti-noded(8) Ganeti | Version @GANETI_VERSION@
+=================================================
+
+Name
+----
+
+ganeti-noded - Ganeti node daemon
+
+Synopsis
+--------
+
+**ganeti-noded** [-f] [-d]
+
+DESCRIPTION
+-----------
+
+The **ganeti-noded** is the daemon which is responsible for the
+node functions in the Ganeti system.
+
+By default, in order to be able to support features such as node
+powercycling even on systems with a very damaged root disk,
+**ganeti-noded** locks itself in RAM using **mlockall**(2). You can
+disable this feature by passing in the ``--no-mlock`` to the daemon.
+
+For testing purposes, you can give the ``-f`` option and the
+program won't detach from the running terminal.
+
+Debug-level message can be activated by giving the ``-d`` option.
+
+Logging to syslog, rather than its own log file, can be enabled by
+passing in the ``--syslog`` option.
+
+The **ganeti-noded** daemon listens to port 1811 TCP, on all
+interfaces, by default. This can be overridden by an entry the
+services database (usually /etc/services) or by passing the ``-p``
+option.  The ``-b`` option can be used to specify the address to bind
+to (defaults to ``0.0.0.0``).
+
+Ganeti noded communication is protected via SSL, with a key
+generated at cluster init time. This can be disabled with the
+``--no-ssl`` option, or a different SSL key and certificate can be
+specified using the ``-K`` and ``-C`` options.
+
+ROLE
+~~~~
+
+The role of the node daemon is to do almost all the actions that
+change the state of the node. Things like creating disks for
+instances, activating disks, starting/stopping instance and so on
+are done via the node daemon.
+
+Also, in some cases the startup/shutdown of the master daemon are
+done via the node daemon, and the cluster IP address is also
+added/removed to the master node via it.
+
+If the node daemon is stopped, the instances are not affected, but
+the master won't be able to talk to that node.
+
+COMMUNICATION PROTOCOL
+~~~~~~~~~~~~~~~~~~~~~~
+
+Currently the master-node RPC is done using a simple RPC protocol
+built using JSON over HTTP(S).