MINOR: fd: move .linger_risk into fdtab[].state

No need to keep this flag apart any more, let's merge it into the global
state. The CLI's output state was extended to 6 digits and the linger/cloned
flags moved inside the parenthesis.
diff --git a/src/sock.c b/src/sock.c
index 19191c8..14b15a3 100644
--- a/src/sock.c
+++ b/src/sock.c
@@ -726,8 +726,8 @@
 	/* Write error on the file descriptor. Report it to the connection
 	 * and disable polling on this FD.
 	 */
-	fdtab[fd].linger_risk = 0;
 	conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH;
+	HA_ATOMIC_AND(&fdtab[fd].state, ~FD_LINGER_RISK);
 	fd_stop_both(fd);
 	return 0;
 
@@ -870,7 +870,7 @@
 
  shut:
 	/* we're certain the connection was shut down */
-	fdtab[fd].linger_risk = 0;
+	HA_ATOMIC_AND(&fdtab[fd].state, ~FD_LINGER_RISK);
 	return 1;
 }