bug fix - we should never try to put keyhash blocks in cache_db, since we can't get it out of there in the retrieve code.  the retrieve RPC does not have an argument to specify which db to look for a block.  for contenthash blocks, this isn't a problem, because only the cache_db contains data of the DHASH_BLOCK format
bug fix - we should never try to put keyhash blocks in cache_db, since we can't get it out of there in the retrieve code.  the retrieve RPC does not have an argument to specify which db to look for a block.  for contenthash blocks, this isn't a problem, because only the cache_db contains data of the DHASH_BLOCK format

weidezhang/dht,sit/dht,weidezhang/dht,weidezhang/dht,weidezhang/dht,sit/dht,sit/dht,sit/dht,sit/dht,weidezhang/dht