Begin config schema for Galaxy (just the new not-in-galaxy.ini logging

option for now, the rest will be autogenerated from the sample)

lib/galaxy/webapps/galaxy/config_schema.yml

@@ -1305,6 +1305,15 @@ mapping:
           https://docs.python.org/2/library/logging.html#logging-levels
           A custom debug level of "TRACE" is available for even more verbosity.
          
+      logging:
+        type: map
+        default: galaxy.config.LOGGING_CONFIG_DEFAULT
+        desc: |
+          Controls where and how the server logs messages. If unset, the default is to log all messages to standard
+          output at the level defined by the `log_level` configuration option. Configuration is described in the
+          documentation at:
+          https://docs.galaxyproject.org/en/master/admin/config_logging.html
+         
       database_engine_option_echo:
         type: bool
         default: false