to branch 'i2p.i2p.str4d.test2' (head fbda38b84fe469dba05367115d2c26dee65fc5f4)

build.xml cleanups
doc updates

Don't say 'Plugin downloaded' when installing from file

Add taglibs-standard-* to apparmor list (ticket #2093)

Only for stretch and later, zesty and later
Copy more files for previous stretch setup to xenial

Clean up SOCKS exceptions

All binaries from Tanuki Delta Pack Community Edition,
except for armhf (armv6), compiled on Raspberry Pi:
  ant 1.8.2
  javac 1.7.0_151
  gcc 4.6.3-14+rpi1
Windows binaries remain unchanged as we must recompile them ourselves
(32 bit just to change the icon; 64 bit is not provided by Tanuki)

Prior to Jetty 9, we used the Tomcat 6 distribution.
As of Jetty 9, we used Tomcat 8.0.33 that was included in the Jetty 9 distribution,
but that is old and doesn't get updated.
Now use the latest Tomcat 8 distribution, and pick the same packages
as Jetty 9 did in their distribution.

InternalSocket: Add support for some methods needed for reseed to work

Incorporate patches 2 and 3 into build scripts

- Show proxy info, if applicable, in logs
- Show status in summary bar for manual reseed (previously hidden if more than 30 routers)
- Show status in summary bar after successul completion
- Show reseed button in summary bar if less than 50 known RIs (previously 30)
- Show current status on /configreseed if already running
- Consolidate proxy settings detection in ReseedRunner constructor
- Enhance help text on /configreseed (tickets #423, #1130)