[ros-diffs] [ion] 24440: - Part 1 of ARC boot cleanups/changes: Create a valid \\SystemRoot symbolic link as the system is booting, which points to the ARC name, then, once drivers have loaded, re-assign it to the proper NT Device name. Added proper security descriptors and flags to symbolic links, as well as proper bugchecks when required. - Kept and cleaned up the ROS hack for CD-ROM boot.