Return failure codes from LCM to client (ticket #1939)

- Don't always send optional delay
- Don't overwrite choking delay with non-choking delay
- Don't send optional delay of 0 every 8 packets
- Don't set options both in CDR.buildPacket() and Conn.sendPacket()
- Set or clear optional delay in packet when retransmitting
- Move choking state variables from ConnectionOptions to Connection
- Move updateAcks() call from PacketLocal to PacketQueue
- Fully implement choking and un-choking
- Reduce periods for some stats
- Comment out some debug logging
- Cleanups
- Fix javadoc HTML broken in previous checkin

Clear correct property if no users are set

javadocs

absolute referer URIs to relative (ticket #1862)

increase max time for shutdown tasks (ticket #1893)
i2psnark: Remove most delay between announces at shutdown

Add support for ports to CONNECT proxy

with dh_installman for debian.
Add i2prouter-nowrapper man page.
Misc. man page fixups (man man-pages for the standard)
No ant targets or deb packaging yet.

and a script to build them.
es complete, zh partial, just for testing.
No ant targets or deb packaging yet.