bug #799434 by markcarver: fixed database query string to use proper syntax

bug #750002 by markcarver: fixed database query string for use with Domain Access
bug #716206 by jbylsma: fixed nodehierarchyaccess to work with D6
bug by markcarver: fixed children table delete links
bug by markcarver: fixed create child links on nodes
feature by markcarver: added grant operation on children table for nodeacces