* [DEV-336] Split addresses in address manager by subnetwork id
* [DEV-336] Load DAG with subnetwork from the config file
* [DEV-336] Remove redundant checks in updateAddrNew and updateAddrTried
This change was suggested as Countermeasure 2 in Eclipse Attacks on
Bitcoin's Peer-to-Peer Network, Ethan Heilman, Alison Kendler, Aviv
Zohar, Sharon Goldberg. ePrint Archive Report 2015/263. March 2015.
This mimics Bitcoin Core commit
f68ba3f67bd500a64fb8932c6b41924ddc31d76f