I've pushed a patch to user/gmcharlt/lp1449283_fix_authen_handler in the security repo that repairs the Apache config and tweaks ::Authen to set the username in the mod_perl request object upon successful authentication, as that's apparently required to avoid the "No authentication done but request not allowed without authentication" errors.
I lightly tested this patch under Apache 2.4 but not 2.2.
I've pushed a patch to user/gmcharlt/ lp1449283_ fix_authen_ handler in the security repo that repairs the Apache config and tweaks ::Authen to set the username in the mod_perl request object upon successful authentication, as that's apparently required to avoid the "No authentication done but request not allowed without authentication" errors.
I lightly tested this patch under Apache 2.4 but not 2.2.