Add missing functions.

Author: reitermarkus

src/libstd/sys/unix/net_fd.rs

@@ -64,6 +64,11 @@ impl NetFileDesc {
         Ok(ret as usize)
     }
 
+    #[inline]
+    pub fn is_read_vectored(&self) -> bool {
+        true
+    }
+
     pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> {
         let mut me = self;
         (&mut me).read_to_end(buf)
@@ -87,6 +92,11 @@ impl NetFileDesc {
         Ok(ret as usize)
     }
 
+    #[inline]
+    pub fn is_write_vectored(&self) -> bool {
+        true
+    }
+
     #[cfg(target_os = "linux")]
     pub fn get_cloexec(&self) -> io::Result<bool> {
         unsafe { Ok((cvt(netc::fcntl(self.fd, netc::F_GETFD))? & netc::FD_CLOEXEC) != 0) }