Patch #1697170 by tobiasb, nick_schuch, adamdicarlo, dagmar: convert menu_configure() to new configuration system.
Issue #1496458 by swentel, pcambra, n3or, kbasarab, sun, marcingy: Convert maintenance mode settings to configuration system.
Merge pull request #346 from hellomrcat/170-maint

Issue #1496458 by swentel, pcambra, n3or, kbasarab, sun, marcingy: Convert maintenance mode settings to configuration system.
Merge pull request #347 from hellomrcat/170-mencon

Patch #1697170 by tobiasb, nick_schuch, adamdicarlo, dagmar: convert menu_configure() to new configuration system.