FileVault requires access to root node

Based on the JCRLT-99 i searched the code base for additional places where access to the root node is required.

tripod, in the attached filevault_root_access.txt you can find the complete result for searching the jcrvlt code base for getRootNode. some seemed to be valid shortcuts (marked with (excluded)) but i suspect that others might require some attention.

if using the functionality provided with a non-admin session, access to the root node is likely to not be granted thus rendering the filevault unusable (or risking privilege escalations by being forced to grant a non-privileged session full access up to the root node).

i will create individual subtasks for the various parts that IMHO need to be fixed.