Release 6.20.6: Change of default client identifier

[Guest]

Due to a recent user story the default client identifier changes from com.openexchange.ox.gui.dhtml to unknown for authenticated clients which do not provide an identifier. This change affects property com.openexchange.ajax.login.http-auth.client in file logging.properties.

See https://www.pivotaltracker.com/story/show/30762431