New log level "notice" set to python log level 25 maps to syslog priority
LOG_NOTICE. Used for some messages in the proxy server, but will be available
to all apps using the LogAdapter returned from get_logger. Cleaned up some
code in get_logger so that console logging works with log_routes and removed
some unneeded bits. NamedFormatter functionality was split between LogAdapter
(which now inherits from logging.LoggerAdapter) and TxnFormatter (which now is
only responsible for adding the log records txn_id).
The proxy server app now configures a separate logger for access line logging.
By default it will use the same settings as the regular proxy logger.
5d0bc6b9c7