Migrate all the logging handlers to namespaces. Make SimpleSAML\Logger a bit more intelligent so that it allows using custom logging handlers. Now you just need to implement SimpleSAML\Logger\LogginghandlerInterface in a class, and set the 'logging.handler' option in the configuration file to a string with the full name of your class.

(being respectful with occurences that might change the behaviour, i.e. default database prefixes)

Reformat the logging classes. Extract the LoggingHandler to its own file. Add proper documentation. Fix typos.