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

Major new functionality, analyzing the results of the new hook_node_access_records_alter() and hook_node_grants_alter().
General clean-up.

Turn the node nid/title into a link fragment pointing to the node (especially useful on pages with multiple nodes).

+ whiteline fixes

Call hook_node_access_records_alter() and hook_node_grants_alter() to correctly mimick core's behavior when evaluating DNA information.

Port to D7 #529772 as well as all other updates that went into the D6 version in the meantime; adapt to core API changes.

Enhance dna_summary text.
Fix some minor bugs.

Fix bad classification of the default grant; tune informatory text; add explanation about rebuilding permissions.

#241060: by salvis. Implement an optional debug mode that displays much more information in the node_access entries block.