Merge pull request #693 from nurupo/dht_bootstrap_daemon

Fixed missing cleanup
Updated DHT server list with onion supporting DHT servers.

Onionised DHT_test.
Added updated bootstrap server.
Adjusted some timeouts and fixed possible memory leak.
Fixed some portability issues.
Adjusted some timeouts.
Fixed bug.
Updated DHT server list.
random_nodes_path should return slightly better paths.

Fixed test in network_test failing on some machines because of localhost
ipv6 issues.
Fixed BSD IP stack issue

Thanks to @mahomet
Merge pull request #694 from stqism/patch-1

Fixed BSD IP stack issue
Decreased interval between sending announce packets.
Update INSTALL.md
Update DHTservers
Merge pull request #695 from benwaffle/patch-2

Update INSTALL.md
Merge pull request #699 from stqism/patch-2

fix redundacies in DHT lists.
Fixed group chat doc.
Set last_noreplay to zero when friend goes offline.
Fixed possible anonimity leak with the onion routing.
Added more error checking