[pylint] .pylintrc - disable missing-function-docstring

Suggested-by: @dalf searxng#102 (comment)
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

.pylintrc

@@ -59,7 +59,9 @@ confidence=
 # --enable=similarities". If you want to run only the classes checker, but have
 # no Warning level messages displayed, use"--disable=all --enable=classes
 # --disable=W"
-disable=bad-whitespace, duplicate-code
+disable=bad-whitespace,
+        duplicate-code,
+        missing-function-docstring,
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option