Remove obsolete protocol specification

The one at https://www.github.com/SampleEnvironment/SECoP
is the correct version!

Change-Id: I4f8a9c3b40ea4e1f3ecea8b7b491dd96cb04d009
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/21437
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

doc/source/server/starting.rst

@@ -0,0 +1,21 @@
+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
+
+