windows-sys: use ADDRESS_FAMILY for sa_family_t

originally Windows SDK didn't have a `sa_family_t` typedef, and we
requested `win32metadata` to add it (microsoft/win32metadata#1538)
and used that from `windows-sys` as our `sa_family_t` definition on
Windows platform (rust-lang#414), which was an oversight. after all, Winsock2
isn't compliant to Posix and has it's own naming scheme, and
`ADDRESS_FAMILY` is intended to be the equivalence of `sa_family_t`.

src/sys/windows.rs

@@ -61,7 +61,7 @@ pub(crate) use windows_sys::Win32::Networking::WinSock::{
     SOCKADDR_STORAGE as sockaddr_storage,
 };
 #[allow(non_camel_case_types)]
-pub(crate) type sa_family_t = windows_sys::Win32::Networking::WinSock::sa_family_t;
+pub(crate) type sa_family_t = windows_sys::Win32::Networking::WinSock::ADDRESS_FAMILY;
 #[allow(non_camel_case_types)]
 pub(crate) type socklen_t = windows_sys::Win32::Networking::WinSock::socklen_t;
 // Used in `Socket`.