Improve ProActiveInet address detection mechanism

[fviale]

Currently ProActiveInet behaves like this:

• If no proactive.net property is set, it will search for a public interface, then a private and finally a loopback
• otherwise it will filter the whole list of inet adresses according to the proactive.net filters set, without preference.
• additionnally all IPv6 are filtered by default.

It should rather:

1. filter first the list of available ip adresses according to the proactive.net properties, then execute the standard preference algorithm
2. don't discard IPv6 adresses but rather prefer IPv4, and only discard link-local ones
3. only the proactive.hostname property would skip the algorithm and bind to a specific IP address