Java 7 check at startup with persisted versions

Add SystemVersion.isJava9()

close files faster based on file count (tickets #1626, #1671)
Remove dup synchs

affecting streaming timers (ticket #1672)
Minor streaming cleanup

Restarter: Don't restart the JobQueue or PeerManager (ticket #1014)/undo previous commit.
More to do.

Removing 193.150.121.66 as a reseed host from the source and its certificate.

convert plain hashes to upper case

- Use Patterns instead of replaceAll()
- Fix isValidDest() for EC/Ed dests

Router: Fix soft restarts for 'massive' clock jumps (over +150s or -61s) and recover from standby/hibernate (ticket #1014).
I2P should now recover (better) from a system hibernate/standby and be able to reconnect to peers automatically.

use high cap for the rest; change outbound exploratory
default length from 2 + 0-1 to 3+0.

 - Export SSL cert on creation
 - new /certs page to show local SSL certs

log timing for /netdb (ticket #1532)

  - Fix bug in forceReschedule() that caused subsequent uncaught IllegalStateException;
    forceReschedule() is only used by streaming timers
  - Log uncaught exceptions
  - Enforce 5 second minimum delay for periodic events
  - atomic count
  - de-wtf

  - Rename bad .torrent files instead of deleting them
  - Add mime type for .xz