Replace the node/$nid/revisions functions with a part of the new diff module

Recently the diff module was upgraded, thx to very nice work of rötzi. In order to push his enhancements, he had to override the core node/$nid/revisions path. If the core function node_revision_overview would have returned a form instead of a table, the diff module could simply alter the form without overriding the complete path.

Now another module, revision_moderation, is requesting to override the core revision path (see issues Override node/$nid/revisions tab and Should an approved revision be copied or not?).

In order to give both modules some room for future enhancements, can we look to modify the current node_revision_overview function in the core?