Merge reserved.php3 functionality into nodecontrol_list.php3,
conditionalized on isadmin() status. These pages were mostly overlapping anyway, and the nodecontrol_list.php3 page was done more cleanly. No point in all the duplication. Dropped the Node Control menu item from the list. Add explicit "widearea" view to get remote nodes in their own page, instead of listed after all the PCs. Also some minor formatting changes.