Revert "Remove unused concrete.permissions.forward_to_login config key"
Revert "Remove unused concrete.permissions.forward_to_login config key"

This reverts commit f7e407ee627ed812ba844c3132c40e3da481d574.

matt9mg/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,TimDix/concrete5,avdevs/concrete5,MichaelMaar/concrete5,avdevs/concrete5,avdevs/concrete5,MichaelMaar/concrete5,TimDix/concrete5,TimDix/concrete5,matt9mg/concrete5