Merge in 345054 from trunk.

Remove support for 'On' and 'Off' for AuthBasicProvider and AuthDigestProvider
as it doesn't actually work as advertised.

Reviewed by: Joshua Slive (concept)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@345055 13f79535-47bb-0310-9956-ffa450edef68