Fix Socket example

Author: Thomasdezeeuw

src/socket.rs

@@ -52,7 +52,7 @@ use crate::{Domain, Protocol, SockAddr, Type};
 ///
 /// // On platforms that support it set `SOCK_CLOEXEC`.
 /// #[cfg(any(target_os = "android", target_os = "dragonfly", target_os = "freebsd", target_os = "linux", target_os = "netbsd", target_os = "openbsd"))]
-/// let protocol = protocol.cloexec();
+/// let ty = ty.cloexec();
 ///
 /// let socket = Socket::new(domain, ty, Some(protocol))?;
 ///