Clean up language selection code in ResourceHelper

The lib was binding to all addresses, and then our
UPnP.updateInterfaces() was closing most of them on first run.
Fix the lib to only bind to the non-public and non-deprecated ones,
using the same getLocalAddresses() method as in our code.

Fallback to Ed25519 on error

for unimplemented ElG import, so CertUtil.loadPrivateKey() will
continue processing and then
fail with the correct exception and error message on bad input.
Pull constant KeySpec out of loop.

make SAMException class public so that it can easily be used by SAM implementers/embedders. Looks like it should have been public, all the constructors are public but the public keyword is missing on the class itself. Make tabs and spacing consistent in that file.

and causing tracker error on initial announce

Strip % suffixes from addresses before comparing
Fix HTTPMUSocket.getLocalAddress() to return the correct bound address
Throw exception on multicast socket bind failures, don't attempt
further operations on failed sockets
Add toString() to sockets for debugging
Log tweaks

to avoid conflict in applications linking to apache jars
As requested by 'mesh' project
Remove with-libhttpclient-java build option
No known external uses other than obsolete i2pcontrol plugin

Interactive SAM Authentication Interface

See merge request !58

Send ack for peer test and relay blocks
Add SSU2 pending inbound states to establisher check
Remove unused PacketBuilder2 method

for routers 0.9.52 or higher

Don't process out-of-session Peer Test message unless enabled

Don't accept store of our RI in RI block

Change size/ip/port fields to match changes in proposal 159

Fix extraction of Charlie address after receiving message 4
for use in message 6