work on #1310 : Improve ProActiveInet address detection mechanism

- Refactored ProActiveInet class to follow the election algorithm even if filters are enabled
- Added a main class to allow checking the result of the address detection from the command line
- Added a method which returns a sorted list of all eligible addresses
- Added a no link-local property (set to true by default) to filter link local addresses as they are non-routable
- Re-enable IPV6 but bind to IPv4 addresses preferably
- Added a "proactive.net.fastest.connection" property, which - when
  enabled - will automatically select the most "visible" interface,
  according to a configurable distant server and port.