pj_getaddrinfo() cannot resolve IPv4 address to synthesized IPv6 address

[nanang]

Currently if IP address is inputted, it will simply return back the IP address. This behaviour is introduced by ticket #458 for tackling issues on Windows Mobile with no network connection.

Unfortunately, the behaviour may cause IPv4 -> IPv6 address resolution fails on Apple platforms:

If your app needs to connect to an IPv4-only server without a DNS hostname,
use getaddrinfo to resolve the IPv4 address literal. If the current network
interface doesn’t support IPv4, but supports IPv6, NAT64, and DNS64,
performing this task will result in a synthesized IPv6 address.

Thanks Johan Lantz for the report.

[nanang]

In 5319:

Fix #1925: pj_getaddrinfo() should invoke getaddrinfo() even when IP address is inputted, except on Windows Mobile platforms (see #458).