DOC: Document the `timeout` option.

examples/pycaosdb.ini

@@ -67,3 +67,6 @@
 
 # This option is used internally and for testing. Do not override.
 # implementation=_DefaultCaosDBServerConnection
+
+# The timeout for requests to the server.
+# timeout=1000

src/doc/configuration.md

@@ -49,6 +49,8 @@ with CaosDB which makes the experience much less verbose. Set it to 1 or 2 in ca
 debugging (which I hope will not be necessary for this tutorial) or if you want to learn more about
 the internals of the protocol. 
 
+`timeout` sets the timeout for requests to the server.
+
 A complete list of options can be found in the 
 [pycaosdb.ini file](https://gitlab.com/caosdb/caosdb-pylib/-/blob/main/examples/pycaosdb.ini) in 
 the examples folder of the source code.