Add OpenBSD installation documentation to 2015.5 branch

doc/topics/installation/index.rst

@@ -30,6 +30,7 @@ These guides go into detail how to install Salt on a given platform.
     fedora
     freebsd
     gentoo
+    openbsd
     osx
     rhel
     solaris

doc/topics/installation/openbsd.rst

@@ -0,0 +1,65 @@
+=======
+OpenBSD
+=======
+
+Salt was added to the OpenBSD ports tree on Aug 10th 2013.
+It has been tested on OpenBSD 5.5 onwards.
+
+Salt is dependent on the following additional ports. These will be installed as
+dependencies of the ``sysutils/salt`` port:
+
+.. code-block:: text
+
+   devel/py-futures
+   devel/py-progressbar
+   net/py-msgpack
+   net/py-zmq
+   security/py-crypto
+   security/py-M2Crypto
+   textproc/py-MarkupSafe
+   textproc/py-yaml
+   www/py-jinja2
+   www/py-requests
+   www/py-tornado
+
+Installation
+============
+
+To install Salt from the OpenBSD pkg repo, use the command:
+
+.. code-block:: bash
+
+    pkg_add salt
+
+Post-installation tasks
+=======================
+
+**Master**
+
+To have the Master start automatically at boot time:
+
+.. code-block:: bash
+
+    rcctl enable salt_master
+
+To start the Master:
+
+.. code-block:: bash
+
+    rcctl start salt_master
+
+**Minion**
+
+To have the Minion start automatically at boot time:
+
+.. code-block:: bash
+
+    rcctl enable salt_minion
+
+To start the Minion:
+
+.. code-block:: bash
+
+    rcctl start salt_minion
+
+Now go to the :doc:`Configuring Salt</ref/configuration/index>` page.