Occasionally a specific user will need the ability to have checkuser flag disable so the reservation is not reclaimed if the user disconnects. This would apply to a sysadmin or a researcher versus a 1st yr student.
In addition to the image profile, add checkuser flag to the reservation table so this can be enabled on a per user/reservation basis in addition to the image profile.
This would be for sysadmins, higher level users and user groups, such as the boss, etc. Set this flag based a per-user and/or on a user group attribute setting.