IP_Address changes:
- Converts to and from String transparently while handling IPv4 as IPv6
mapped (::ffff:[IP]) address internally.
- Completely remove AddrType enum.
- Setting/Getting of ip array is now only possible through dedicated functions
(ie. set_ipv4, get_ipv4, set_ipv6, get_ipv6)
- Add function to know if the address is a valid IPv4 (for IP implementation and enet)
(cherry picked from commit 1aff508dd9)
Unify network socket creation between platform.
Ensure IPV6_V6ONLY flag is not set on sockets (allow IPv4 connection in IPv6 socket, dual-stack).
(cherry picked from commit 812908e236)
The address size passed to network system calls now reflects the the actual IP type (v4 or v6).
Fix Windows and OSX ipv6 sockets
(cherry picked from commit 80e911647c)
