Add support loggin conf for panko

Add support fluentd.conf for openstack_log_appender param
with fluentd, ossyslog handlers.

Change-Id: I57b9cdacbe028ab96ee89f9a3d3fd247999a0df1
Related-Prod: PROD-19781
diff --git a/README.rst b/README.rst
index bada6d1..2a9932b 100644
--- a/README.rst
+++ b/README.rst
@@ -48,6 +48,33 @@
           - host: 10.20.0.104
             port: 11211
 
+Enhanced logging with logging.conf
+----------------------------------
+
+By default logging.conf is disabled.
+
+That is possible to enable per-binary logging.conf with new variables:
+  * openstack_log_appender - set it to true to enable log_config_append for all OpenStack services;
+  * openstack_fluentd_handler_enabled - set to true to enable FluentHandler for all Openstack services.
+
+Only WatchedFileHandler and FluentHandler are available.
+
+Also it is possible to configure this with pillar:
+
+.. note:: This works only if service doesnt run under apache-wsgi
+
+.. code-block:: yaml
+
+  panko:
+    server:
+      logging:
+        log_appender: true
+        log_handlers:
+          watchedfile:
+            enabled: true
+          fluentd:
+            enabled: true
+
 
 More information
 ================