GeoIPv6 update 2018-08-16 from Maxmind

Revert changes checked-in in revision ec64be9e9faf415091bda0fe3567c6460310f7ad as they were not intended for this branch

Update PeerState to use CachedIteratorCollection as propagation from i2p.i2p appears to have wiped out changes

Update PeerState.java to use CachedIteratorAbstract
Add some debugging lines to determine cause(s) of higher udp.sendFailed/sendAggressiveFailed stats

minor efficiency improvements in parsing

log tweaks

Use timer to delay close after sending termination
Prevent sending more data after termination

Log tweaks

Fix sending termination after msg3 p2 fails

Fix error sending large message
Fix NPE after handshake failure

Hardcode useDirectBuffers config