so peer ordering does not change across restarts

  - Add new opentrackers, remove welterde
  - Support multiple default opentrackers
  - Don't link to opentrackers at the top

Recognize router.newsRefreshFrequency=0 as "never"

was deleted out from under us (ticket #1407)

ECDSA default for all new server tunnels
ECDSA default for streamr client tunnels
Fix display of server destination on edit page when not running (privkey file path wasn't absolute)
Fix display of persistent client key b32 on edit page when not running
Fix display of server sig type on edit page when we have a privkey file
Add KeysAndCert.getSigType()
Javadocs

Fix history.txt UTF-8 breakage
Javadoc fixes after review

Console /debug: Move DHT section to bottom

 - Fix SU3File support (tested)
 - Finish implementation (untested)
 - Output metadata as comments in news.xml
 - Support signed HTML
 - Copy router certs to news

No spec yet, just followed str4d's testnews.atom.xml proposal.
Atom parsing is tested, su3 part is incomplete and untested.
Todo: add spec to http://i2p-projekt.i2p/en/docs/spec/updates,
finish su3 and test.

Switch back to QueuedThreadPool (ticket #1395)
In Jetty 5/6, the default QTP was not concurrent, so we switched to
ThreadPoolExecutor with a fixed-size queue, a set maxThreads,
and a RejectedExecutionPolicy of CallerRuns.
Unfortunately, CallerRuns causes lockups in Jetty NIO.
In addition, no flavor of TPE gives us what QTP does:
- TPE direct handoff (which we were using) never queues.
  This doesn't provide any burst management when maxThreads is reached.
  CallerRuns was an attempt to work around that.
- TPE unbounded queue does not adjust the number of threads.
  This doesn't provide automatic resource management.
- TPE bounded queue does not add threads until the queue is full.
  This doesn't provide good responsiveness to even small bursts.
QTP adds threads as soon as the queue is non-empty.
QTP as of Jetty 7 uses concurrent.
QTP unbounded queue is the default in Jetty.
So switch back to QTP with a bounded queue, which does what we want,
which is first expand the thread pool, then start queueing, then reject.

ref:
http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html
https://wiki.eclipse.org/Jetty/Howto/High_Load

   types Standard, IRC, and Socks IRC, if non-shared.

 - code cleanup in direction handling