don't pollute Hash cache

due to previous bugs

            to branch 'i2p.i2p' (head e7f2b0990f1ff9ab0e0d8633ac2faf35a993b917)

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

Recognize router.newsRefreshFrequency=0 as "never"

Disallow SSDP port

was deleted out from under us (ticket #1407)

Full acks were included in the bitfield portion, which
ran over and appeared to be fragments.
Also clean up setting bytes with initial data, for clarity.

 - Add block size to superblock
 - Add span size to skiplist block
 - Bump version to 1.2

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

     and '995a4e27dc6bd096a6eb83acfc9e2e09c9cb61aa'

Android build tools 21.0.* caused dalvikvm runtime errors before this change.

     and 'feed7db1184a2b8a06ddf35d45dc0e993895e2be'

Console /debug: Move DHT section to bottom