MINOR: fd: Set owner and iocb field before inserting a new fd in the fdtab

This will be needed for concurrent accesses.

include/proto/connection.h

@@ -108,12 +108,12 @@ static inline void conn_ctrl_init(struct connection *conn)
 	if (!conn_ctrl_ready(conn)) {
 		int fd = conn->handle.fd;
 
+		fdtab[fd].owner = conn;
+		fdtab[fd].iocb = conn_fd_handler;
 		fd_insert(fd);
 		/* mark the fd as ready so as not to needlessly poll at the beginning */
 		fd_may_recv(fd);
 		fd_may_send(fd);
-		fdtab[fd].owner = conn;
-		fdtab[fd].iocb = conn_fd_handler;
 		conn->flags |= CO_FL_CTRL_READY;
 	}
 }

src/dns.c

@@ -1721,9 +1721,9 @@ int dns_init_resolvers(int close_socket)
 			fcntl(fd, F_SETFL, O_NONBLOCK);
 
 			/* add the fd in the fd list and update its parameters */
-			fd_insert(fd);
 			fdtab[fd].owner = dgram;
 			fdtab[fd].iocb = dgram_fd_handler;
+			fd_insert(fd);
 			fd_want_recv(fd);
 			dgram->t.sock.fd = fd;