Fix up the cells in the table in the node_access entries block with the proper class (needed for Bartik theme).

use drupal_var_export() instead of var_dump() during our debugging functions. It is more readable. krumo users don't necessarily see much of this.

Fix failure to detect some 'alien' {node_access} records (records that should not be in the table and would be removed by rebuilding permissions).

#839770 by jcfiala. Notice: Undefined property: stdClass:: in forum_node_presave() when generating forum nodes

#754130 by moshe weitzman. Variable editor displays message indicating a variable was deleted when none was.