- When socket is closed, set sessionID and LS to null,
    close subsession and set its sessionID and LS to null
  - Checks on client side for null session ID
  - Check for null session in Destroy Session message
  - Don't kill I2CP connection due to a bad session ID
    in a SendMessage, just drop the message and send
    a MessageStatusMessage
  - Log tweaks

            to branch 'i2p.i2p' (head b977ab50209475c0e74825f361924e05dbd470c7)

Catch null SessionId in messages and stop connection instead of NPE
Wait for LS in SubSession in connect() so we don't send data w/o
a session ID and leaseset
Log tweaks

I2CP connection shutdown
Sort tweaks for shared clients in summary bar

debian: Add support for setting open file limits to initscript, add comment to explain how to do it with systemd

     and 'f13d8499995c44dc76ae61d4b5c4c936e307eb89'

when NTP is blocked

  Send our own RI unsolicited in reply if we aren't floodfill
  Don't ack or flood a store of an unknown type
PeerTestJob: Don't generate zero reply token
Tunnels: More checks of messages received down exploratory tunnels
javadocs and comments

Store the session in Connection;
Don't create a new ConnectionManager for a subsession,
now that all components track the session properly.
@since updates

handle multisession, especially on the incoming side.
More refactoring to follow

            to branch 'i2p.i2p.zzz.multisess' (head 70fc07857232668b93ca6ba02c433dffc7639132)

- Silence 'no streams' warning when we can't connect to an IRC server. Change to WARN.

- Directly connect to nearby floodfills to share our RI to speed up integration of new floodfills (#1195).
- Called on both non-ff -> ff OR ff -> non-ff.
- Create FloodfillRouterInfoFloodJob to do so.