[installation] Init with inital config for global

share/doc/seiscomp/html/_sources/base/addons.rst.txt

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+.. _addons:
+
+*************
+Addon Modules
+*************
+
+Addon modules make use of the |scname| framework but do not ship with the
+|scname| package. Instead they are provided in separate packages. These packages
+can be downloaded and deployed or
+:ref:`compiled from source code <compiling_source>` separately. How these
+modules eventually integrate into the default |scname| installation depends on
+these addon modules themselves.
+
+The modules are:
+
+.. toctree::
+   :maxdepth: 2
+   :titlesonly:
+
+   /base/addons/sed