Improve doc.

Change-Id: I0b25fd1c645a47084fb7fda1bbb7d41a2d10dcbb

doc/source/playground/server/starting.rst

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+Starting
+========
+
+The SECoP server can be started via the ``bin/secop-server`` script.
+
+.. parsed-literal::
+
+    usage: secop-server [-h] [-v | -q] [-d] name
+
+    Manage a SECoP server
+
+    positional arguments:
+      name             Name of the instance. Uses etc/name.cfg for configuration
+
+    optional arguments:
+      -h, --help       show this help message and exit
+      -v, --verbose    Output lots of diagnostic information
+      -q, --quiet      suppress non-error messages
+      -d, --daemonize  Run as daemon
+
+