+25Jun06=======================================================================
+1. make sure that a C record is sent for node call every update period.
+2. make announces work again (probably).
24Jun06=======================================================================
1. Fix the routing algorithms to allow route selection in the face of
incomplete trees of nodes (trees as produced by sh/newc).
2. Fix the obscout issues which mean that many nodes get timed out after 3hrs.
+3. Extend 4m to 70631 to cover CT.
23Jun06=======================================================================
1. fix basic deduping algorithm
2. rearrange node startup protocol to avoid issuing unnecessary PC92 and also