Ant version 1.9.8 or higher now required
Drop support for Xenial package build
Fix up BOB build configuration
Fix i2psnark standalone build

Switch Bionic to 9.x
Disco+ already on 9.x
Xenial remains on 8.x
Update dependencies doc

Bundle 2.0 API only; remove 1.1 API
Convert DoH, NDT, and i2pcontrol to the 2.x API
Fix i2pcontrol handling of number values and serialization for 2.x API
Remove xenial dependency on libjson-simple-java, it has only 1.1
Set min and max version constraint on libjson-simple-java for bionic+
Based on patch from Gilles Filippini
ref: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901827
This does not support 3.x but the patch for that will be smaller.

Add xenial patch to ant test target

Jetty 9.3.28 (ticket #2098)
This breaks Debian builds, fixes to follow

not needed for rrd4j with our patch

2019-02-10
From https://github.com/rrd4j/rrd4j/releases
Copyright (c) 2001-2005 Sasa Markovic and Ciaran Treanor.
Copyright (c) 2011 The OpenNMS Group, Inc.
Copyright 2011 The RRD4J Authors.
Apache 2.0 and LGPLv2.1

Unmodified as a base for future merges, except for omitted
files listed below.
This rev will not work; font patch to follow in next revision.

Following directories and files omitted:
converter/
core/RrdBerkeleyDbBackendFactory.java
core/RrdBerkeleyDbBackend.java
core/RrdMongoDBBackendFactory.java
core/RrdMongoDBBackend.java
demo/
graph/RrdGraphDefTemplate.java
inspector/
eu/bengreen/data/utility/

checklist updates

Debian: Change debian files from stretch (Jetty 9.2, Tomcat 8, Java 8) to buster (Jetty 9.4, Tomcat 9, Java 11)
Add debian-alt/stretch files
Update debian-alt/precise, trusty, xenial, bionic, disco to include
 the changes from buster, not stretch
Remove debian-alt/buster, unstable files
Doc updates

Add links to Arabic, Hungarian, Indonesian
Fix link to Italian

Reverts fix for #2329 for these distros

Fixes compatibility with Jetty 9.4
Patch from Emmanuel Bourg, see
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916177
Briefly tested by mhatta

Update dependencies doc