===========================
  STAGER MAINTENANCE MODE
===========================

Stager support a convenient way of disabling Stager front-end usage. If system is under maintenance, Stager can be put in maintenance mode. There are three levels of maintanance modes. To set Stager in maintanance mode, simply put a file with one of the filenames below, in the maintanance directory of the Stager frontend, with the error message to diplay for the user. To restore from mainanance mode, remove the file, or rename it.

no_db.txt				If this file exist, all access to Stager is denied, and the content of the file
						is displayed as an error message.
						
no_report.txt			If this file exists, basic UI navigation of Stager frontend works as normal, but
						all reports are denied.
						
report_warning.txt		If this file exists, Stager both UI navigation and reports are available, but the
						content of this file is displayed as an warning.

If none of the files above exists, Stager is not in maintanance mode.

Typical use of the mainatanace mode, is for periodic scripts which perform heavy load on the system, in example full vaccum on the database. The script may put a message in a maintanance file on startup, and remove the file when completed.


