(tickets #715 and #743)
 * SystemVersion: Centralize more methods here

    - Better IPv6 test, hopefully will work on Windows
    - Hide home page flags once language is selected
    - Home page shrinkage and other CSS tweaks

             connectors, so Jetty will still start without them

      to eliminate races with ReadConfigJob

    - Fix failsafe shutdown hook broken in 0.8.8;
      HUP, INT, and TERM signals should now shut down cleanly.
    - Shutdown hook no longer prevents other hooks from running
    - Trap HUP, if router.gracefulHUP=true, and do graceful shutdown.
      Only under wrapper, non-Windows.
    - i2prouter stop now uses SIGTERM
    - Implement i2prouter graceful using SIGHUP (ticket #580)
    - Configure wrapper to ignore SIGUSR1 and SIGUSR2 as they will shut down
      or crash the JVM

- Add delay in systray port checker to ensure console is up
- Move I2PRequestLog to net.i2p.jetty package

- Uncomment eepsite concurrent ThreadPool and fix arguments
- Reduce eepsite acceptors to 1
- Add jetty-ssl.xml example
- jetty.xml cleanup

- Fix nowebapp.jsp for non-started webapps
- Fix nowebapp.jsp for url /foo for non-started webapp foo

Jetty 6 package.

- Add several jars from the Jetty 6 distribution
- Update jetty.xml
- Add context XML files
- Update WorkingDir to migrate the content XML files
- Update RouterConsoleRunner and LocaleWebAppHandler
- Remove all old Jetty 5.1.15 local mods;
  this will break Seedless using a custom Server() constructor
- Update I2PRequestLog to be a mod of NCSARequestLog from 6.1.26
- Put I2PRequestLog in its own jar
- Copy MultiPartRequest and other required classes from Jetty 5.1.15
  and add it to susimail, as the replacement MultiPartFilter in
  Jetty 6 is difficult to migrate to, and does not support content-type
- Update i2psnark for Jetty 6
- Disable i2psnark RunStandalone, unused and instantiated Jetty 5
- Fix up all webapp build.xml to reference new jars

Not yet working: Plugin/webapp run detection and stopping, eepsite CGI
Not well tested: Plugins, classpaths, webapps

Add hooks so the new PortMapper lets i2p plugins not fail when the router console is not on port 7657. Also raise an exception when requesting unregistered ports so as to encourage swift adding of the registration hooks when those ports are taken.

    - More refactoring tasks to their own files
    - Adjust some thread priorities

    - Implement and call shutdown for BandwidthRefiller
    - Implement and register shutdown hook for Timestamper
    - Implement and register shutdown hook for Jetty console server
    - Fix UPnP-SSDPNotifySocket thread not stopping
    - Fix all but one UDP PacketHandler threads not stopping

      - Fix numerous readme HTML errors
      - Fix flag locations in readmes
      - desktopgui.enable now defaults to false; run systray if false
      - Start icon app before console
      - Restore systray form in configservice.jsp
      - Only save lang when clicking on flags if desktopgui is running
      - Only allow two-letter lang code from cgi parameter

- Added correct 'stop I2P' functionality in desktopgui.

               set min/max threads and idle timeout

      - Add SSL support - To enable, change clients.config. Examples:
            ## Change to SSL only - just add a '-s'
            clientApp.0.args=-s 7657 ::1,127.0.0.1 ./webapps/
            ## Use both non-SSL and SSL - add '-s port interface'
            clientApp.0.args=7657 ::1,127.0.0.1 -s 7667 ::1,127.0.0.1 ./webapps/
            ## ...and change URLLauncher args further down for the browser to open https:// at startup if you like.

      - Always show start button for webapps and plugins
    * configclients.jsp, configupdate.jsp:
      - Fix submission when entering CR in a text box
    * Plugins:
      - Stop all plugins at shutdown
      - Log tweaks
    * WebApps:
      - Remove the WAC after stopping it
      - Stop a WAC before starting it to prevent dups

      - Hook up update/delete/check/save buttons
      - Implement delete
      - Hide unless router.enablePlugins=true