XSB Src (SVN)-old

Changed memset of very long chunk buffer to be incremental and stop sooner. Was put in for obscure gc bug we dont have a test for, so it is hard to test.

Tool to help with binary searches to find the version of XSB that broke something.

Fix obscure bug in delete_return in handling the combination of defined and undefined answers.

Very minor fix in handling big arities for interned structures.

Fix bug in checking internstr when arity > 255.

Minor efficiency improvement with tag checking.

Explicit initialization of no max memory set.

Fix bug in intersect_db (in rtl_intersect/3) and add comments.

Fixed buglet in update_views/4.

all tests working (including abd and map)