Update socket.rs

Author: niklasha

src/socket.rs

@@ -1135,6 +1135,7 @@ impl Socket {
         target_os = "haiku",
         target_os = "illumos",
         target_os = "netbsd",
+        target_os = "openbsd",
         target_os = "redox",
         target_os = "solaris",
     )))]