* reduced the number of tags passed when garlic routing a tunnelCreate
* catch timeout on a tunnel message quicker
* give a tunnel message a new messageId per hop
* added some more infrastructure for per-hop tunnelId
* removed SourceRouteBlock & SourceRouteReplyMessage, as they're a redundant concept
that 1) takes up bandwidth 2) takes up CPU 3) smell funny.
now the TunnelCreateMessage includes a replyTag, replyKey, replyTunnel, and
replyGateway that they garlic encrypt their ACK/NACK through and with.
* tunnelCreateMessage doesn't need a seperate ACK - either we get a
TunnelCreateStatusMessage back or we don't.
* message structure mods for unique tunnel ID per hop (though currently all hops have
the same tunnel ID)
(making a searchReply message ~100 bytes, down from ~30KB, and the lookup message ~64 bytes, down from ~10KB)
* when we get the netDb searchReply or lookup message referencing someone we don't know,
we fire off a lookup for them
* reduced some excessive padding
* dropped the DbSearchReplyMessageHandler, since it shouldn't be used (all search replies
should be handled by a MessageSelector built by the original search message)
* removed some oddball constructors from the SendMessageDirectJob and SendTunnelMessageJob (always must specify a timeout)
* refactored SendTunnelMessageJob main handler method into smaller logical methods
cleaned up rebuild / verification process so that the select*TunnelIds will always return what is necessary
for the moment, don't automatically kill all tunnels of a peer who fails just once (they can recover)
logging
if/when the property "timestamper.enabled" is set, the timestamper will query the sntp server(s) and update the clock accordingly
if/when it is not set (or set to something other than "true"), it will pause with its standard delay before checking again
in addition, it has a guard to help running the timestamper multiple times in the same JVM
new piece of data exposed and maintained is a list of router contexts - shown as a singleton off RouterContext - allowing an app in the same JVM to find the routers (and chose between which one they want)
