Zeroconf/link-local/ActiveSync IPv4 adress 169.254.x.x may be used on Windows Mobile devices (thanks Jan Boquist for the info)

[bennylp]

Windows Mobile devices when hooked to ActiveSync uses IP address 169.254.2.x for the hostname and default route (implicitly this means that this address is also returned by IP interface enumeration function).

This would cause this address to be returned by PJLIB's pj_gethostip() even when there is another valid and better IP address returned by the interface enumeration function (for example, valid Wi-Fi address).

[bennylp]

In r3121:

• add treatment for special IPv4/IPv6 addresses: loopback address and link-local address
• with this treatment, link-local address will only be used if there is no other non-loopback/non-link-local IP addresses, and loopback address will only be used if there's absolutely no other IP address

[bennylp]

In r3124:

• fixed MSVC compilation warning

[bennylp]

In r3133:

• fixed the wrong priority which caused zeroconf address to end up having the same priority as a legitimate interface (thanks Karl-Fredrik Blixt Hagholm for the report)