DOC: add treatment of deprecated files to docstring

src/caosdb/configuration.py

@@ -100,7 +100,10 @@ def _read_config_files():
 
     Read the config from either ``$PYCAOSDBINI`` or home directory (``~/.pylinkahead.ini``), and
     additionally adds config from a config file in the current working directory
-    (``pylinkahead.ini``).  All of these are optional.
+    (``pylinkahead.ini``).
+    If deprecated names are used (starting with 'pycaosdb'), those used in addition but the files
+    with the new naming scheme take precedence.
+    All of these files are optional.
 
     Returns
     -------