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)
Fabio Alessandrelli
Ariel Manzur
George Marques
sanikoyes
Juan Linietsky
Theo Hallenius