docs: add comments to the example config file

And rename it to sbws.

docs/source/config.rst

@@ -27,8 +27,8 @@ The user example config file provided by ``sbws`` might look like this.
 
 .. _init-config:
 
-.. literalinclude:: /examples/config.example.ini
-    :caption: Example config.example.ini
+.. literalinclude:: /examples/sbws.example.ini
+    :caption: Example sbws.example.ini
 
 **No other configuration files are read.**
 

docs/source/examples/config.example.ini → docs/source/examples/sbws.example.ini

@@ -4,7 +4,9 @@
 nickname = sbws_default
 
 [destinations]
-foo = off
+# a destination can be disabled changing `on` by `off`
+foo = on
 
 [destinations.foo]
+# the domain and path to the 1GB file.
 url = https://example.com/does/not/exist.bin