- 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

  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

- 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.

log tweaks

isn't treated as CLOSED and immediately replaced by i2ptunnel,
which caused dup shared clients in a race at startup
(possible related tickets #642, #650, #815, #1545)

- FloodfillMonitorJob:
  - Use avg of router.tunnelBacklog instead of current backlog
- Some language/spelling fixes

caused by calling close() from HTTPResponseOutputStream.Pusher,
but close() rendered the underlying InflaterInputStream unusable.
Broken in -15. Caused failed HTTP fetches and other flakiness.

I2P session closes (ticket #1563)

Full version is used as the su3 version.
Uses same su3 certs as release updates. Users may add additional certs
to ~/.i2p/certificates/router/ as necessary.
Copy echelon's reseed key for use as a router signer.
Unsigned update remains a separate option for now.
Various update subsystem cleanups.

where it was missing (ticket #1531)

add bandwidth classes P and X (ticket #1447)

Don't include NTCP conns established too long ago in clock skew vector
Hide unestablished outbound NTCP conns from /peers view
Add per-transport status to /peers
Put status description instead of code into event log reachability changes

- NTCP inbound skew calculation had flipped sign
- Include RTT in NTCP skew calulation
- Set SSU skew on first packet so it's right from the beginning
- Above should fix the "ignoring clock offset" error
- Javadocs
RouterClock:
- Add config to disable clock adjustment for testing
- Reduce window in skew vector for slew calculation
- Double max slew rate

broken in fix for ticket #815