Peer test tries only one peer every 5 minutes, and uses a store of
the peer's own router info, which is not helpful.
Peer test records its result as a dbLookup success/failure,
but for the peers that are not floodfill, this stat is useless.
The tunnel test is disabled by default except for hidden mode.
The tunnel test response time stat uses a large amount of memory (5 rates)
and has apparently never been used since it was added in 2004.
There's also a separate tunnel test time average variable, separate
from the stat, that is also unused.
Each is disabled with a separate hardcoded config,
pending evaluation of whether and how to make the tests useful
and where to effectively use the result for peer selection.
Rename ShortTunnelBuildReplyMessage to OutboundTunnelBuildReplyMessage (type 26)
Add InboundTunnelBuildMessage (type 27)
Add methods for plaintext record
Update readMessage() and writeMessageBody()
Fix calculateWrittenLength()
Update javadocs
WIP, untested, not hooked in yet
SocketTimeout fix for total timeout remaining less than inactivity timeout
SocketTimeout javadoc fixes
EepHead check for null SocketTimeout, javadoc fixes
Remove blanket unreachable test for inbound tunnels, replace with reachable test for IBGW only
Retain inbound reachable test for hidden routers
Retain inbound reachable test for first hour of uptime
Add outbound reachable test for first hour of uptime
Add locally-unreachable test for outbound tunnels (was inbound only)
Minor cleanups
Log tweaks
List updated using the Freedom in the World Index 2020
Force hidden mode routers to LU
Don't publish stats in first hour of uptime
Add H.323 to invalid ports list
Improve crashed message in event log
